%0 Journal Article %A Edward Dobrowolski %A Tadeusz Januszkiewicz %T Arithmetic of an elliptic curve and circle actions on four-manifolds %J Colloquium Mathematicum %D 1993 %P 13-18 %V 64 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/cm-64-1-13-18/ %R 10.4064/cm-64-1-13-18 %G en %F 10_4064_cm_64_1_13_18