中国科学院数学与系统科学研究院期刊网
AMS
Coincidence Points and Invariant Approximation Results for Multimaps
Donal O'REGAN, Naseer SHAHZAD
Acta Mathematica Sinica . 2007, (9): 1601 -1610 .  DOI: 10.1007/s10114-005-0768-1