@article{1103841573, author = {Slawny, Joseph}, title = {A converse to a theorem by Friedrichs}, journal = {Comm. Math. Phys.}, volume = {12}, number = {1}, year = {1969}, pages = { 175-179}, language = {en}, url = {http://dml.mathdoc.fr/item/1103841573} }
Slawny, Joseph. A converse to a theorem by Friedrichs. Comm. Math. Phys., Tome 12 (1969) no. 1, pp. 175-179. http://gdmltest.u-ga.fr/item/1103841573/