@article{AIHPA_1969__10_3_247_0, author = {Rocca, F. and Sirugue, M. and Testard, D.}, title = {Translation invariant quasi-free states and Bogoliubov transformations}, journal = {Annales de l'I.H.P. Physique th\'eorique}, volume = {10}, year = {1969}, pages = {247-258}, mrnumber = {249060}, language = {en}, url = {http://dml.mathdoc.fr/item/AIHPA_1969__10_3_247_0} }
Rocca, F.; Sirugue, M.; Testard, D. Translation invariant quasi-free states and Bogoliubov transformations. Annales de l'I.H.P. Physique théorique, Tome 10 (1969) pp. 247-258. http://gdmltest.u-ga.fr/item/AIHPA_1969__10_3_247_0/