TY - JOUR AU - Kay Wingberg TI - A Riemann-Hurwitz formula for the Selmer group of an elliptic curve with complex multiplication. JO - Commentarii mathematici Helvetici PY - 1988 SP - 587 EP - 592 VL - 63 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/CMH_1988__63_4_140135/ ID - CMH_1988__63_4_140135 ER -