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@article{JRAM_1990__408_153241, author = {E. Horozov}, title = {Perturbations of the spherical pendulum and {Abelian} integrals.}, journal = {Journal f\"ur die reine und angewandte Mathematik}, pages = {114--135}, publisher = {mathdoc}, volume = {408}, year = {1990}, zbl = {0692.58031}, url = {http://geodesic.mathdoc.fr/item/JRAM_1990__408_153241/} }
E. Horozov. Perturbations of the spherical pendulum and Abelian integrals.. Journal für die reine und angewandte Mathematik, Tome 408 (1990), pp. 114-135. http://geodesic.mathdoc.fr/item/JRAM_1990__408_153241/