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@article{IVM_1968_2_a1, author = {I. A. Bernadskii and R. A. Minlos}, title = {The defect indices of symmetric {Jacobian} matrices}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {16--20}, publisher = {mathdoc}, number = {2}, year = {1968}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1968_2_a1/} }
I. A. Bernadskii; R. A. Minlos. The defect indices of symmetric Jacobian matrices. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 2 (1968), pp. 16-20. http://geodesic.mathdoc.fr/item/IVM_1968_2_a1/