Anna Freud was a prolific writer, contributing articles on psychoanalysis to many different publications throughout her lifetime.
Her first publication was titled, An Introduction to Psychoanalysis: Lectures for Child Analysts and Teachers 1922-1935, and was the result of four different lectures she was delivering at the time, to teachers and caretakers of young children in Vienna.

Anna Freud's first article Beating fantasies and daydreams (1922), 'drew in part on her own inner life, but th[at] ... made her contribution no less scientific'.
 In it she explained how, 'Daydreaming, which consciously may be designed to suppress masturbation, is mainly unconsciously an elaboration of the original masturbatory fantasies'.
 Her father, Sigmund Freud, had earlier covered very similar ground in '"A Child is Being Beaten"' – 'they both used material from her analysis as clinical illustration in their sometimes complementary papers' – in which he highlighted a female case where 'an elaborate superstructure of day-dreams, which was of great significance for the life of the person concerned, had grown up over the masochistic beating-phantasy ... [one] which almost rose to the level of a work of art'.

'Her views on child development, which she expounded in 1927 in her first book, An Introduction to the Technique of Child Analysis, clashed with those of Melanie Klein ... [who] was departing from the developmental schedule that Freud, and his analyst daughter, found most plausible'.
 In particular, Anna Freud's belief that 'In children's analysis, the transference plays a different role ... and the analyst not only "represents mother" but is still an original second mother in the life of the child' became something of an orthodoxy over much of the psychoanalytic world.

For her next major work in 1936, The Ego and the Mechanisms of Defence,  a classic monograph on ego psychology and defense mechanisms, Anna Freud drew on her own clinical experience, but relied on her father's writings as the principal and authoritative source of her theoretical insights'.
 Here her 'cataloguing of regression, repression, reaction formation, isolation, undoing, projection, introjection, turning against the self, reversal and sublimation' helped establish the importance of the ego functions and the concept of defence mechanisms, continuing the greater emphasis on the ego of her father – 'We should like to learn more about the ego' – during his final decades.

Special attention was paid in it to later childhood and adolescent developments – 'I have always been more attracted to the latency period than the pre-Oedipal phases' – emphasising how the 'increased intellectual, scientific, and philosophical interests of this period represent attempts at mastering the drives'.
 The problem posed by physiological maturation has been stated forcefully by Anna Freud. "
Aggressive impulses are intensified to the point of complete unruliness, hunger becomes voracity... The reaction-formations, which seemed to be firmly established in the structure of the ego, threaten to fall to pieces".

Selma Fraiberg's tribute of 1959 that 'The writings of Anna Freud on ego psychology and her studies in early child development have illuminated the world of childhood for workers in the most varied professions and have been for me my introduction and most valuable guide spoke at that time for most of psychoanalysis outside the Kleinian heartland.

Arguably, however, it was in Anna Freud's London years 'that she wrote her most distinguished psychoanalytic papers – including "About Losing and Being Lost", which everyone should read regardless of their interest in psychoanalysis'.
Her description therein of 'simultaneous urges to remain loyal to the dead and to turn towards new ties with the living' may perhaps reflect her own mourning process after her father's recent death.

Focusing thereafter on research, observation and treatment of children, Anna Freud established a group of prominent child developmental analysts (which included Erik Erikson, Edith Jacobson and Margaret Mahler) who not
Anna Freud was a prolific writer, contributing articles on psychoanalysis to many different publications throughout her lifetime. Her first publication was titled, An Introduction to Psychoanalysis: Lectures for Child Analysts and Teachers 1922-1935, and was the result of four different lectures she was delivering at the time, to teachers and caretakers of young children in Vienna. 
Anna Freud's first article Beating fantasies and daydreams (1922), 'drew in part on her own inner life, but th[at] ... made her contribution no less scientific'.  In it she explained how, 'Daydreaming, which consciously may be designed to suppress masturbation, is mainly unconsciously an elaboration of the original masturbatory fantasies'.  Her father, Sigmund Freud, had earlier covered very similar ground in '"A Child is Being Beaten"' – 'they both used material from her analysis as clinical illustration in their sometimes complementary papers' – in which he highlighted a female case where 'an elaborate superstructure of day-dreams, which was of great significance for the life of the person concerned, had grown up over the masochistic beating-phantasy ... [one] which almost rose to the level of a work of art'.
'Her views on child development, which she expounded in 1927 in her first book, An Introduction to the Technique of Child Analysis, clashed with those of Melanie Klein ... [who] was departing from the developmental schedule that Freud, and his analyst daughter, found most plausible'.  In particular, Anna Freud's belief that 'In children's analysis, the transference plays a different role ... and the analyst not only "represents mother" but is still an original second mother in the life of the child' became something of an orthodoxy over much of the psychoanalytic world.
For her next major work in 1936, The Ego and the Mechanisms of Defence,  a classic monograph on ego psychology and defense mechanisms, Anna Freud drew on her own clinical experience, but relied on her father's writings as the principal and authoritative source of her theoretical insights'.  Here her 'cataloguing of regression, repression, reaction formation, isolation, undoing, projection, introjection, turning against the self, reversal and sublimation' helped establish the importance of the ego functions and the concept of defence mechanisms, continuing the greater emphasis on the ego of her father – 'We should like to learn more about the ego' – during his final decades.
Special attention was paid in it to later childhood and adolescent developments – 'I have always been more attracted to the latency period than the pre-Oedipal phases' – emphasising how the 'increased intellectual, scientific, and philosophical interests of this period represent attempts at mastering the drives'.  The problem posed by physiological maturation has been stated forcefully by Anna Freud. "Aggressive impulses are intensified to the point of complete unruliness, hunger becomes voracity... The reaction-formations, which seemed to be firmly established in the structure of the ego, threaten to fall to pieces".
Selma Fraiberg's tribute of 1959 that 'The writings of Anna Freud on ego psychology and her studies in early child development have illuminated the world of childhood for workers in the most varied professions and have been for me my introduction and most valuable guide spoke at that time for most of psychoanalysis outside the Kleinian heartland.
Arguably, however, it was in Anna Freud's London years 'that she wrote her most distinguished psychoanalytic papers – including "About Losing and Being Lost", which everyone should read regardless of their interest in psychoanalysis'. Her description therein of 'simultaneous urges to remain loyal to the dead and to turn towards new ties with the living' may perhaps reflect her own mourning process after her father's recent death.
Focusing thereafter on research, observation and treatment of children, Anna Freud established a group of prominent child developmental analysts (which included Erik Erikson, Edith Jacobson and Margaret Mahler) who not
Anna Freud