Fig. 2From: Percentage-based Author Contribution Index: a universal measure of author contribution to scientific articlesUniverse of possible ACIs. X-axis: total number of authors including (n = 2 to n = 200); Y-axis: percentage contribution of author (=0.001 to =0.999); Z-axis: author contribution index for author (see Eq. ( 1 )). Colours correspond to the value of ACI (see coloured scale on the right)Back to article page