%0 Journal Article %A Marek Lassak %T Reduced spherical polygons %J Colloquium Mathematicum %D 2015 %P 205-216 %V 138 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/cm138-2-5/ %R 10.4064/cm138-2-5 %G en %F 10_4064_cm138_2_5