@article{1102945119,
author = {Uhlig, Frank},
title = {Definite and semidefinite matrices in a real symmetric matrix pencil.},
journal = {Pacific J. Math.},
volume = {49},
number = {2},
year = {1973},
pages = { 561-568},
language = {en},
url = {http://dml.mathdoc.fr/item/1102945119}
}
Uhlig, Frank. Definite and semidefinite matrices in a real symmetric matrix pencil.. Pacific J. Math., Tome 49 (1973) no. 2, pp. 561-568. http://gdmltest.u-ga.fr/item/1102945119/