@article{EJDE_2011__2011__a85,
     author = {Ismailov, Zameddin I. and Otkun Cevik, Elif and Unluyol, Erdal},
     title = {Compact inverses of multipoint normal differential operators for first order},
     journal = {Electronic Journal of Differential Equations},
     publisher = {mathdoc},
     volume = {2011},
     year = {2011},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EJDE_2011__2011__a85/}
}