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@article{IVM_1988_2_a1, author = {J. R. Arteaga and A. P. Norden}, title = {Mathematical principles for the classification of energy states}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {9--14}, publisher = {mathdoc}, number = {2}, year = {1988}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1988_2_a1/} }
J. R. Arteaga; A. P. Norden. Mathematical principles for the classification of energy states. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 2 (1988), pp. 9-14. http://geodesic.mathdoc.fr/item/IVM_1988_2_a1/