@article{10_4153_CJM_1971_064_2,
     author = {Salinas, Norberto},
     title = {On the \ensuremath{\eta} {Function} of {Brown} and {Pearcy} and the {Numerical} {Function} of an {Operator}},
     journal = {Canadian journal of mathematics},
     pages = {565--578},
     year = {1971},
     volume = {23},
     number = {4},
     doi = {10.4153/CJM-1971-064-2},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1971-064-2/}
}