中国科学院数学与系统科学研究院期刊网
AMS
Idempotent Completions of Operator Partial Matrices
Jinchuan Hou, Heydar Radjavi, Peter Rosenthal
Acta Mathematica Sinica . 1999, (3): 333 -346 .  DOI: 10.1007/BF02650728