@article{05786203,
title = {Spectral concentration in Sturm-Liouville equations with large negative potential.},
journal = {Electronic Journal of Differential Equations (EJDE) [electronic only]},
volume = {2010},
year = {2010},
zbl = {1203.34141},
language = {en},
url = {http://dml.mathdoc.fr/item/05786203}
}
Harris, Bernard J.; Kallenbach, Jeffrey C. Spectral concentration in Sturm-Liouville equations with large negative potential.. Electronic Journal of Differential Equations (EJDE) [electronic only], Tome 2010 (2010) . http://gdmltest.u-ga.fr/item/05786203/