忻元龙. AN ESTIMATE FOR THE IMAGE DIAMETER AND ITS APPLICATION TO SUBMANIFOLDS WITH PARALLEL MEAN CURVATURE[J]. 数学物理学报(英文版), 1985, 5(3): 303-308.
Y. L. Xin. AN ESTIMATE FOR THE IMAGE DIAMETER AND ITS APPLICATION TO SUBMANIFOLDS WITH PARALLEL MEAN CURVATURE[J]. Acta mathematica scientia,Series B, 1985, 5(3): 303-308.