中国科学院数学与系统科学研究院期刊网
AMS
Additive Preservers of Idempotence and Jordan Homorphisms between Rings of Square Matrices
Hong Mei YAO, Chong Guang CAO, Xian ZHANG
Acta Mathematica Sinica . 2009, (4): 639 -648 .  DOI: 10.1007/s10114-009-7165-0