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@article{IVM_1962_1_a6, author = {I. S. Kac}, title = {On the genus of the spectrum of a singular string}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {57--64}, publisher = {mathdoc}, number = {1}, year = {1962}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1962_1_a6/} }
I. S. Kac. On the genus of the spectrum of a singular string. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 1 (1962), pp. 57-64. http://geodesic.mathdoc.fr/item/IVM_1962_1_a6/