@article{03991940,
title = {On the convergence of biorthogonal series corresponding to nonselfadjoint Sturm-Liouville operator with discontinuous coefficients.},
journal = {Publications de l'Institut Math\'ematique. Nouvelle S\'erie},
volume = {39(53)},
year = {1986},
pages = {129-133},
zbl = {0613.34021},
language = {en},
url = {http://dml.mathdoc.fr/item/03991940}
}
Lažetić, Nebojša L. On the convergence of biorthogonal series corresponding to nonselfadjoint Sturm-Liouville operator with discontinuous coefficients.. Publications de l'Institut Mathématique. Nouvelle Série, Tome 39(53) (1986) pp. 129-133. http://gdmltest.u-ga.fr/item/03991940/