@article{GDZPPN001178539, title = {Positivity in Complex Spaces and Its Application to Gershgorin Discs.}, journal = {Numerische Mathematik}, volume = {44}, year = {1984}, pages = {67-74}, zbl = {0548.15011}, url = {http://dml.mathdoc.fr/item/GDZPPN001178539} }
Zenger, C. Positivity in Complex Spaces and Its Application to Gershgorin Discs.. Numerische Mathematik, Tome 44 (1984) pp. 67-74. http://gdmltest.u-ga.fr/item/GDZPPN001178539/