中国科学院数学与系统科学研究院期刊网
ON THE POINCARE'S GROUPS AND THE EXTENDED UNIVERSAL COVERINGS OF CLOSED ORIENTABLE TWO-MANIFOLDS
江泽涵
ON THE POINCARE'S GROUPS AND THE EXTENDED UNIVERSAL COVERINGS OF CLOSED ORIENTABLE TWO-MANIFOLDS
TSAI-HAN KIANG 
数学学报 . 1936, (1): 93 -153 .  DOI: 10.12386/A1936sxxb0007