TY - JOUR AU - Yasutsugu Fujita TI - Torsion subgroups of elliptic curves with non-cyclic torsion over ${\Bbb Q}$ in elementary abelian 2-extensions of ${\Bbb Q}$ JO - Acta Arithmetica PY - 2004 SP - 29 EP - 45 VL - 115 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4064/aa115-1-3/ DO - 10.4064/aa115-1-3 LA - en ID - 10_4064_aa115_1_3 ER -