@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/