@article{GDZPPN001166700, title = {Bounds for the Inequality of Wielandt.}, journal = {Numerische Mathematik}, volume = {10}, year = {1967}, pages = {142-146}, zbl = {0158.03505}, url = {http://dml.mathdoc.fr/item/GDZPPN001166700} }
Loizou, G. Bounds for the Inequality of Wielandt.. Numerische Mathematik, Tome 10 (1967) pp. 142-146. http://gdmltest.u-ga.fr/item/GDZPPN001166700/