@article{1102991872, author = {Riddell, R. C.}, title = {Spectral concentration for self-adjoint operators.}, journal = {Pacific J. Math.}, volume = {23}, number = {3}, year = {1967}, pages = { 377-401}, language = {en}, url = {http://dml.mathdoc.fr/item/1102991872} }
Riddell, R. C. Spectral concentration for self-adjoint operators.. Pacific J. Math., Tome 23 (1967) no. 3, pp. 377-401. http://gdmltest.u-ga.fr/item/1102991872/