@article{GDZPPN001166174,
title = {Some Approximate Integration Formulas of Degree 3 for an n-Dimensional Simplex.},
journal = {Numerische Mathematik},
volume = {9},
year = {1966},
pages = {38-45},
zbl = {0145.40603},
url = {http://dml.mathdoc.fr/item/GDZPPN001166174}
}
STROUD, A.H. Some Approximate Integration Formulas of Degree 3 for an n-Dimensional Simplex.. Numerische Mathematik, Tome 9 (1966) pp. 38-45. http://gdmltest.u-ga.fr/item/GDZPPN001166174/