@article{1103857332, author = {van Daele, A.}, title = {Quasi-equivalence of quasi-free states on the Weyl algebra}, journal = {Comm. Math. Phys.}, volume = {20}, number = {1}, year = {1971}, pages = { 171-191}, language = {en}, url = {http://dml.mathdoc.fr/item/1103857332} }
van Daele, A. Quasi-equivalence of quasi-free states on the Weyl algebra. Comm. Math. Phys., Tome 20 (1971) no. 1, pp. 171-191. http://gdmltest.u-ga.fr/item/1103857332/