TY - JOUR AU - Hourong Qin TI - The 4-rank of $K₂O_F$ for real quadratic fields F JO - Acta Arithmetica PY - 1995 SP - 323 EP - 333 VL - 72 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4064/aa-72-4-323-333/ DO - 10.4064/aa-72-4-323-333 LA - en ID - 10_4064_aa_72_4_323_333 ER -