@article{1181072204,
author = {Ibrahim, Sobhy E.},
title = {Non Self-Adjoint Quasi-Differential Operators with Discrete Spectra},
journal = {Rocky Mountain J. Math.},
volume = {25},
number = {4},
year = {1995},
pages = { 1053-1078},
language = {en},
url = {http://dml.mathdoc.fr/item/1181072204}
}
Ibrahim, Sobhy E. Non Self-Adjoint Quasi-Differential Operators with Discrete Spectra. Rocky Mountain J. Math., Tome 25 (1995) no. 4, pp. 1053-1078. http://gdmltest.u-ga.fr/item/1181072204/