Hakobyan, G. S., and R. Lotfikar. “INITIAL BOUNDARY VALUE PROBLEM FOR SOME CLASS OF NON-LINEAR DEGENERATE PSEUDOPARABOLIC EQUATIONS ”. Proceedings of the YSU A: Physical and Mathematical Sciences, vol. 43, no. 2 (219), June 2009, pp. 16-20, doi:10.46991/PYSU:A/2009.43.2.016.