中国科学院数学与系统科学研究院期刊网
AMS
The K°-relation on the Congruence Lattice of a Regular Semigroup with an Inverse Transversal
Ying Ying FENG, Li Min WANG
Acta Mathematica Sinica . 2012, (5): 1061 -1074 .  DOI: 10.1007/s10114-011-9112-0