Jenaliyev, M. T., A. S. Kassymbekova, and M. Yergaliyev. “On a Boundary Value Problem for a Boussinesq-Type Equation in a Triangle”. Journal of Mathematics, Mechanics and Computer Science, vol. 115, no. 3, Sept. 2022, pp. 36-48, doi:10.26577/JMMCS.2022.v115.i3.04.