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@article{DAN_1973_212_1_a6, author = {S. A. Lomov}, title = {Formalism of nonclassical perturbation theory}, journal = {Doklady Akademii Nauk}, pages = {33--36}, publisher = {mathdoc}, volume = {212}, number = {1}, year = {1973}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1973_212_1_a6/} }
S. A. Lomov. Formalism of nonclassical perturbation theory. Doklady Akademii Nauk, Tome 212 (1973) no. 1, pp. 33-36. http://geodesic.mathdoc.fr/item/DAN_1973_212_1_a6/