@article{GDZPPN001170368,
title = {On Complex Eigenvalues of M and P Matrices.},
journal = {Numerische Mathematik},
volume = {19},
year = {1972},
pages = {170-175},
url = {http://dml.mathdoc.fr/item/GDZPPN001170368}
}
Kellogg, R.B. On Complex Eigenvalues of M and P Matrices.. Numerische Mathematik, Tome 19 (1972) pp. 170-175. http://gdmltest.u-ga.fr/item/GDZPPN001170368/