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@article{MAT_1961_5_3_a3, author = {E. Nelson and F. Stinespring}, title = {Representation of elliptic operators in an enveloping algebra}, journal = {Matematika}, pages = {81--94}, publisher = {mathdoc}, volume = {5}, number = {3}, year = {1961}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MAT_1961_5_3_a3/} }
E. Nelson; F. Stinespring. Representation of elliptic operators in an enveloping algebra. Matematika, Tome 5 (1961) no. 3, pp. 81-94. http://geodesic.mathdoc.fr/item/MAT_1961_5_3_a3/