%0 Journal Article %A Min Chen %T A fundamental domain for the modular group of Riemann surfaces of type (0,n) %J Annales Fennici Mathematici %D 1998 %P 275-281 %V 23 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/AFM_1998_23_2_a1/ %G en %F AFM_1998_23_2_a1