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@article{DAN_1988_298_4_a3, author = {M. I. Ganzburg}, title = {Exact constants of the best harmonic approximation of a function}, journal = {Doklady Akademii Nauk}, pages = {788--791}, publisher = {mathdoc}, volume = {298}, number = {4}, year = {1988}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1988_298_4_a3/} }
M. I. Ganzburg. Exact constants of the best harmonic approximation of a function. Doklady Akademii Nauk, Tome 298 (1988) no. 4, pp. 788-791. http://geodesic.mathdoc.fr/item/DAN_1988_298_4_a3/