[1] Broek P M. Group representations in indefinite metric spaces. J Math Phys, 1984, 25:  1205--1210

[2] Broek P M. Symmetry transformations in indefinite metric spaces: a generalization of Wigner's theorem. Physica A: Statistical and Theoretical Physics, 1984, 127: 599--612

[3] Molnàr L. Orthogonality preserving transformations on indefinite inner product spaces: generalization of Uhlhorn's version of
Wigner's theorem.  J Funct Anal, 2002, 194: 248--262

[4] Molnár L. A Wigner-type theorem on symmetry transformations in type II factor.  Int J Theor Phys, 2000, 39: 1463--1466

[5] Molnár L. A generalization of Wigner's unitary-antiunitary theorem to Hilbert modules. J Math Phys, 1999, 40:  5544--5554

[6]  Petz D. Monotone metrics on matrix spaces. Linear Algebra Appl, 1996, 244: 81--96

[7]  Petz D. Geometry of canonical correlation on the state space of a quantum system. J Math Phys, 1994, 35:  780--795

[8] 安桂梅, 侯晋川. 矩阵代数上的可乘保持映射. 数学物理学报, 2008, 28A(1): 1194--1205