@article{GDZPPN001186604, title = {Modified optimal quadrature extensions.}, journal = {Numerische Mathematik}, volume = {66}, year = {1993}, pages = {511-520}, zbl = {0801.65016}, url = {http://dml.mathdoc.fr/item/GDZPPN001186604} }
Patterson, T.N.L. Modified optimal quadrature extensions.. Numerische Mathematik, Tome 66 (1993) pp. 511-520. http://gdmltest.u-ga.fr/item/GDZPPN001186604/