Voir la notice de l'article provenant de la source Mathematicac Balkanica website
@article{MABA_1988_2_2_a14, author = {Liudmil Alexandrov. Vasil Popov}, title = {Onesided {Trigonometrical} {Approximation} of {Periodic} {Multivariate} {Functions}}, journal = {Mathematica balkanica}, pages = {230}, publisher = {mathdoc}, volume = {2}, number = {2}, year = {1988}, url = {http://geodesic.mathdoc.fr/item/MABA_1988_2_2_a14/} }
Liudmil Alexandrov. Vasil Popov. Onesided Trigonometrical Approximation of Periodic Multivariate Functions. Mathematica balkanica, Tome 2 (1988) no. 2, p. 230. http://geodesic.mathdoc.fr/item/MABA_1988_2_2_a14/