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@article{MMO_1972_26_a5, author = {N. N. Nehoro\v{s}ev}, title = {Action-angle variables, and their generalizations}, journal = {Trudy Moskovskogo matemati\v{c}eskogo ob\^{s}estva}, pages = {181--198}, publisher = {mathdoc}, volume = {26}, year = {1972}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MMO_1972_26_a5/} }
N. N. Nehorošev. Action-angle variables, and their generalizations. Trudy Moskovskogo matematičeskogo obŝestva, Trudy Moskovskogo Matematicheskogo Obshchestva, Tome 26 (1972), pp. 181-198. http://geodesic.mathdoc.fr/item/MMO_1972_26_a5/