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@article{MZM_1974_15_5_a5, author = {B. A. Kats}, title = {Convexity and star-shapedness of the level curves of polynomials}, journal = {Matemati\v{c}eskie zametki}, pages = {701--710}, publisher = {mathdoc}, volume = {15}, number = {5}, year = {1974}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_1974_15_5_a5/} }
B. A. Kats. Convexity and star-shapedness of the level curves of polynomials. Matematičeskie zametki, Tome 15 (1974) no. 5, pp. 701-710. http://geodesic.mathdoc.fr/item/MZM_1974_15_5_a5/