Evaluate the collective function of references cited together in a given text segment.
Classify their combined role into one of the following categories: 'method', 'background', or 'result'.

Text:…and often impossible task (see, e.g., Herrmann et al., 1990; Saunders et al., 1992; Anderson et al., 2010; Franklin, 2010), and stature estimations may vary largely depending on the applied method (see, e.g., Sciulli et al., 1990; Raxter et al., 2007; Siegmund, 2010; Carretero et al., 2012).
Category: