Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DAN_1963_149_2_a1, author = {Ivo Babushka}, title = {Optimal quadrature formulae}, journal = {Doklady Akademii Nauk}, pages = {227--229}, publisher = {mathdoc}, volume = {149}, number = {2}, year = {1963}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1963_149_2_a1/} }
Ivo Babushka. Optimal quadrature formulae. Doklady Akademii Nauk, Tome 149 (1963) no. 2, pp. 227-229. http://geodesic.mathdoc.fr/item/DAN_1963_149_2_a1/