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@article{MM_1998_10_2_a9, author = {V. V. Ganina}, title = {On stability of pendulm's upper equilibrium position}, journal = {Matemati\v{c}eskoe modelirovanie}, pages = {110--114}, publisher = {mathdoc}, volume = {10}, number = {2}, year = {1998}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MM_1998_10_2_a9/} }
V. V. Ganina. On stability of pendulm's upper equilibrium position. Matematičeskoe modelirovanie, Tome 10 (1998) no. 2, pp. 110-114. http://geodesic.mathdoc.fr/item/MM_1998_10_2_a9/