%0 Journal Article %A G. Gromadzki %A W. Marzantowicz %T Conformal actions with prescribed periods on Riemann surfaces %J Fundamenta Mathematicae %D 2011 %P 169-190 %V 213 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/fm213-2-3/ %R 10.4064/fm213-2-3 %G en %F 10_4064_fm213_2_3