@article{EJDE_2015__2015__a23,
     author = {Ismailov,  Zameddin I. and Ipek,  Pembe},
     title = {Solvability of multipoint differential operators of first order},
     journal = {Electronic journal of differential equations},
     year = {2015},
     volume = {2015},
     zbl = {1310.47061},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EJDE_2015__2015__a23/}
}