Jenaliyev, M.T., Kassymbekova, A.S., Yergaliyev, M.G., & Assetov, A.A. (2022). An initial boundary value problem for the Boussinesq equation in a Trapezoid. Bulletin of the Karaganda University. Mathematics Series, 2(106), 117–127. https://doi.org/10.31489/2022m2/117-127