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@article{DE_1969_5_7_a11, author = {B. S. Kalitin}, title = {The vibrations of a mathematical pendulum with a shock impulse}, journal = {Differencialʹnye uravneni\^a}, pages = {1267--1274}, publisher = {mathdoc}, volume = {5}, number = {7}, year = {1969}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1969_5_7_a11/} }
B. S. Kalitin. The vibrations of a mathematical pendulum with a shock impulse. Differencialʹnye uravneniâ, Tome 5 (1969) no. 7, pp. 1267-1274. http://geodesic.mathdoc.fr/item/DE_1969_5_7_a11/