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@article{FAA_1992_26_4_a13, author = {V. N. Karpushkin}, title = {Bounds for the {Betti} numbers of a level surface of a harmonic polynomial}, journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a}, pages = {86--88}, publisher = {mathdoc}, volume = {26}, number = {4}, year = {1992}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/FAA_1992_26_4_a13/} }
V. N. Karpushkin. Bounds for the Betti numbers of a level surface of a harmonic polynomial. Funkcionalʹnyj analiz i ego priloženiâ, Tome 26 (1992) no. 4, pp. 86-88. http://geodesic.mathdoc.fr/item/FAA_1992_26_4_a13/
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