@article{UZERU_2012_2_a1,
     author = {G. S. Hakobyan and S. Ghorbanian},
     title = {Initial-boundary value problem for second order degenerate pseudohyperbolic equations},
     journal = {Proceedings of the Yerevan State University. Physical and mathematical sciences},
     pages = {10--13},
     publisher = {mathdoc},
     number = {2},
     year = {2012},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/UZERU_2012_2_a1/}
}