@article{1103898914,
author = {Bracci, L. and Morchio, G. and Strocchi, F.},
title = {Wigner's theorem on symmetries in indefinite metric spaces},
journal = {Comm. Math. Phys.},
volume = {40},
number = {1},
year = {1975},
pages = { 289-299},
language = {en},
url = {http://dml.mathdoc.fr/item/1103898914}
}
Bracci, L.; Morchio, G.; Strocchi, F. Wigner's theorem on symmetries in indefinite metric spaces. Comm. Math. Phys., Tome 40 (1975) no. 1, pp. 289-299. http://gdmltest.u-ga.fr/item/1103898914/