Mirza Mamajonov, Khilolaxon Shermatova, and Tursunoy Mukhtorova, “ON ONE BOUNDARY PROBLEM FOR A PARABOLIC-HYPERBOLIC EQUATION OF THE THIRD ORDER, WHEN THE CHARACTERISTIC OF THE FIRST ORDER OPERATOR IS PARALLEL TO THE YORDINATE AXIS”, IJSSIR, vol. 11, pp. 105–110, Jan. 2022.