@article{10_21136_CPM_1967_117588, author = {Marek, Ivo}, title = {On approximate methods in eigenvalue problems}, journal = {\v{C}asopis pro p\v{e}stov\'an{\'\i} matematiky}, pages = {89--104}, publisher = {mathdoc}, volume = {092}, number = {1}, year = {1967}, doi = {10.21136/CPM.1967.117588}, mrnumber = {0211598}, zbl = {0167.13903}, language = {en}, url = {http://geodesic.mathdoc.fr/articles/10.21136/CPM.1967.117588/} }