@article{1103900232, author = {Cantoni, Vittorio}, title = {Enveloping subspaces and superposition of states}, journal = {Comm. Math. Phys.}, volume = {46}, number = {1}, year = {1976}, pages = { 241-244}, language = {en}, url = {http://dml.mathdoc.fr/item/1103900232} }
Cantoni, Vittorio. Enveloping subspaces and superposition of states. Comm. Math. Phys., Tome 46 (1976) no. 1, pp. 241-244. http://gdmltest.u-ga.fr/item/1103900232/