@article{GDZPPN001172751,
title = {Optimale Quadraturformeln mit semidefiniten Peano-Kernen. - Optimal Integration Formulas with Semidefinite Peano-Kernels.},
journal = {Numerische Mathematik},
volume = {25},
year = {1975},
pages = {239-250},
zbl = {0304.65019},
url = {http://dml.mathdoc.fr/item/GDZPPN001172751}
}
Jetter, K. Optimale Quadraturformeln mit semidefiniten Peano-Kernen. - Optimal Integration Formulas with Semidefinite Peano-Kernels.. Numerische Mathematik, Tome 25 (1975) pp. 239-250. http://gdmltest.u-ga.fr/item/GDZPPN001172751/