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@article{DAN_1979_248_2_a2, author = {B. D. Boyanov}, title = {Uniqueness of optimal quadrature formulas}, journal = {Doklady Akademii Nauk}, pages = {272--274}, publisher = {mathdoc}, volume = {248}, number = {2}, year = {1979}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1979_248_2_a2/} }
B. D. Boyanov. Uniqueness of optimal quadrature formulas. Doklady Akademii Nauk, Tome 248 (1979) no. 2, pp. 272-274. http://geodesic.mathdoc.fr/item/DAN_1979_248_2_a2/