TY - JOUR AU - Urbanowicz, Jerzy TI - Connections between $B_{2,\chi }$ for even quadratic Dirichlet characters $\chi $ and class numbers of appropriate imaginary quadratic fields, I JO - Compositio Mathematica PY - 1990 SP - 247 EP - 270 VL - 75 IS - 3 PB - Kluwer Academic Publishers UR - http://archive.numdam.org/item/CM_1990__75_3_247_0/ LA - en ID - CM_1990__75_3_247_0 ER -