Hakobyan, G.; Ghorbanian, S. . INITIAL-BOUNDARY VALUE PROBLEM FOR SECOND ORDER DEGENERATE PSEUDOHYPERBOLIC EQUATIONS. Proc. YSU A: Phys. Math. Sci. 2012, 46 (2 (228), 10-13. https://doi.org/10.46991/PYSUA.2012.46.2.010.