@article{GDZPPN001172476,
title = {Diskrete Approximation von Eigenwertproblemen. I. Qualitative Konvergenz.},
journal = {Numerische Mathematik},
volume = {25},
year = {1975},
pages = {355-374},
zbl = {0391.65020},
url = {http://dml.mathdoc.fr/item/GDZPPN001172476}
}
Grigorieff, R.D. Diskrete Approximation von Eigenwertproblemen. I. Qualitative Konvergenz.. Numerische Mathematik, Tome 25 (1975) pp. 355-374. http://gdmltest.u-ga.fr/item/GDZPPN001172476/