1. G. N. Agaev, “On the first boundary-value problem for linear degenerate parabolic equations,” Izv. Akad. Nauk Azer. SSR, Ser. Fiz.-Tekh. Mat. Nauk, 2, 10–16 (1976).
2. M. Bokalo and V. Dmytriv, “Fourier problem for a different-component evolutionary system of equations with integral delay,” Visn. Lviv. Univ., Ser. Mekh.-Mat., 60, 32–49 (2002).
3. M. Bokalo and O. Il’nyts’ka, “Mixed problems for parabolic equations with variable delay,” Bukov. Mat. Zh., 3, 16–24 (2015).
4. O. M. Buhrii, “Problems with homogeneous boundary conditions for nonlinear equations with degeneration,” Ukr. Mat. Visn., 5, 435–469 (2008).
5. L. É. Él’sgol’ts and S. B. Norkin, Introduction to the Theory of Differential Equations with Deviating Argument [in Russian], Nauka, Moscow (1971).