Measurement of the photon structure function <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si1.gif" overflow="scroll"><mml:msubsup><mml:mi>F</mml:mi><mml:mn>2</mml:mn><mml:mi>γ</mml:mi></mml:msubsup></mml:math> with the L3 detector at LEP
Physics letters. B