@article{GDZPPN001166298, title = {Some Generalizations of Positive Definiteness and Monotonicity.}, journal = {Numerische Mathematik}, volume = {9}, year = {1966}, pages = {163-172}, zbl = {0148.25801}, url = {http://dml.mathdoc.fr/item/GDZPPN001166298} }
FIEDLER, M.; PTÁK, V. Some Generalizations of Positive Definiteness and Monotonicity.. Numerische Mathematik, Tome 9 (1966) pp. 163-172. http://gdmltest.u-ga.fr/item/GDZPPN001166298/