中国科学院数学与系统科学研究院期刊网
AMS
Obstruction Theory and Coincidences in Positive Codimension
Daciberg GONC ALVES, Jerzy JEZIERSKI, Peter WONG
Acta Mathematica Sinica . 2006, (5): 1591 -1602 .  DOI: 10.1007/s10114-005-0797-9