@article{1102971804, author = {Sinclair, Allan M.}, title = {Eigenvalues in the boundary of the numerical range.}, journal = {Pacific J. Math.}, volume = {35}, number = {3}, year = {1970}, pages = { 231-234}, language = {en}, url = {http://dml.mathdoc.fr/item/1102971804} }
Sinclair, Allan M. Eigenvalues in the boundary of the numerical range.. Pacific J. Math., Tome 35 (1970) no. 3, pp. 231-234. http://gdmltest.u-ga.fr/item/1102971804/