中国科学院数学与系统科学研究院期刊网
AMS
Some Results Connected with the Class Number Problem in Real Quadratic Fields
Aleksander GRYTCZUK, Jaroslaw GRYTCZUK
Acta Mathematica Sinica . 2005, (5): 1107 -1112 .  DOI: 10.1007/s10114-005-0544-2