%0 Journal Article %A Zomorrodian, Reza %T Classification of p-groups of automorphisms of Riemann surfaces and their lower central series %J Glasgow mathematical journal %D 1987 %P 237-244 %V 29 %N 2 %U http://geodesic.mathdoc.fr/articles/10.1017/S0017089500006881/ %R 10.1017/S0017089500006881 %F 10_1017_S0017089500006881