中国科学院数学与系统科学研究院期刊网
JSSC
NORMAL EULER NUMBERS OF EMBEDDING NONORIENTABLE SURFACES IN 4-MANIFOLDS
GAO Hongzhu
NORMAL EULER NUMBERS OF EMBEDDING NONORIENTABLE SURFACES IN 4-MANIFOLDS
GAO Hongzhu
Journal of Systems Science and Complexity . 1996, (3): 242 -251 .