@article{GDZPPN001180460,
title = {Optimal Addition of Knots to Cubature Formulae for Planar Regions.},
journal = {Numerische Mathematik},
volume = {50},
year = {1986},
pages = {269-274},
zbl = {0574.65014},
url = {http://dml.mathdoc.fr/item/GDZPPN001180460}
}
Cools, Ronald; Haegemans, Ann. Optimal Addition of Knots to Cubature Formulae for Planar Regions.. Numerische Mathematik, Tome 50 (1986) pp. 269-274. http://gdmltest.u-ga.fr/item/GDZPPN001180460/