Vinh, P. C., Thanh Hue, T. T., Quang, D. V., Khanh Linh, N. T., & Nam, N. T. (2010). Method of first integrals and interface, surface waves. Vietnam Journal of Mechanics, 32(2), 107–120. https://doi.org/10.15625/0866-7136/32/2/310