@article{AM2_1996__52_1-2_137651,
     author = {J\"urg R\"atz},
     title = {On {Wigner's} theorem: {Remarks,} complements, comments, and corollaries.},
     journal = {Aequationes mathematicae},
     pages = {1--9},
     publisher = {mathdoc},
     volume = {52},
     number = {1-2},
     year = {1996},
     zbl = {0860.39033},
     url = {http://geodesic.mathdoc.fr/item/AM2_1996__52_1-2_137651/}
}