@article{GDZPPN002037726,
title = {On the positivity of ultraspherical type quadrature formulas with Jacobi abscissas.},
journal = {Aequationes mathematicae},
volume = {38},
year = {1989},
pages = {10-27},
zbl = {0683.41039},
url = {http://dml.mathdoc.fr/item/GDZPPN002037726}
}
Sottas, G. On the positivity of ultraspherical type quadrature formulas with Jacobi abscissas.. Aequationes mathematicae, Tome 38 (1989) pp. 10-27. http://gdmltest.u-ga.fr/item/GDZPPN002037726/