@article{UZERU_2006_2_a1,
     author = {T. N. Harutyunyan and G. G. Sahakyan},
     title = {The existence of the eigenvalues for dirac{\textquoteright}s two-parameter boundary-value problem},
     journal = {Proceedings of the Yerevan State University. Physical and mathematical sciences},
     pages = {25--32},
     publisher = {mathdoc},
     number = {2},
     year = {2006},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/UZERU_2006_2_a1/}
}