@article {117148,
	title = {Perturbed discrete Sturm- Liouville problems and associated sampling theorem},
	journal = {Rocky Mountain Journal of Mathematics},
	volume = {39},
	year = {2009},
	pages = {1781{\textendash}1807},
	author = {M. H. Annaby and Hassan, HA and O. H. El-Haddad}
}
