@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/