@article{GDZPPN002550288, title = {Maximal order for quadratures using n evaluations.}, journal = {Aequationes mathematicae}, volume = {20}, year = {1980}, pages = {68-97}, zbl = {0446.41009}, url = {http://dml.mathdoc.fr/item/GDZPPN002550288} }
Werschulz, A.G. Maximal order for quadratures using n evaluations.. Aequationes mathematicae, Tome 20 (1980) pp. 68-97. http://gdmltest.u-ga.fr/item/GDZPPN002550288/