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@article{MZM_1988_44_3_a10, author = {G. S. Petrov}, title = {The problem of the number of zeros of an elliptic integral is semialgebraic}, journal = {Matemati\v{c}eskie zametki}, pages = {393--401}, publisher = {mathdoc}, volume = {44}, number = {3}, year = {1988}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_1988_44_3_a10/} }
G. S. Petrov. The problem of the number of zeros of an elliptic integral is semialgebraic. Matematičeskie zametki, Tome 44 (1988) no. 3, pp. 393-401. http://geodesic.mathdoc.fr/item/MZM_1988_44_3_a10/