@article{1181069477,
author = {Wei, Guangsheng and Xu, Zongben},
title = {A Characterization of Boundary Conditions for Regular Sturm-Liouville Problems which Have the Same Lowest Eigenvalues},
journal = {Rocky Mountain J. Math.},
volume = {36},
number = {6},
year = {2006},
pages = { 741-763},
language = {en},
url = {http://dml.mathdoc.fr/item/1181069477}
}
Wei, Guangsheng; Xu, Zongben. A Characterization of Boundary Conditions for Regular Sturm-Liouville Problems which Have the Same Lowest Eigenvalues. Rocky Mountain J. Math., Tome 36 (2006) no. 6, pp. 741-763. http://gdmltest.u-ga.fr/item/1181069477/