Grigoryan, S. A., Manukyan, S. M., & Ohanyan, G. G. (2004). EXACT PARTICULAR SOLUTIONS OF NONLINEAR KLEIN-GORDON EQUATION AND THEIR APPLICATION IN FLUID MECHANICS. Proceedings of the YSU A: Physical and Mathematical Sciences, 38(3 (205), 42–48. https://doi.org/10.46991/PYSU:A/2004.38.3.042