Tepoyan, L.P. and Kalvand, D. 2010. NEUMANN PROBLEM FOR FOURTH ORDER DEGENERATE ORDINARY DIFFERENTIAL EQUATIONS. Proceedings of the YSU A: Physical and Mathematical Sciences. 44, 1 (221) (Jan. 2010), 22–26. DOI:https://doi.org/10.46991/PYSU:A/2010.44.1.022.