- A. Bentrad, “On the solutions of some classes of PDE with singular coefficients”, Complex Variables and Elliptic Equations, 65, no. 5, 2020, 765

- Elina Shishkina, Sergei Sitnik, Transmutations, Singular and Fractional Differential Equations with Applications to Mathematical Physics, 2020, 275

- A. V. Glushak, Transmutation Operators and Applications, 2020, 379

- Transmutations, Singular and Fractional Differential Equations with Applications to Mathematical Physics, 2020, 527

- A. Bentrad, “The Appell’s function F3 and the solutions of a PDE with singular coefficients”, Complex Variables and Elliptic Equations, 64, no. 1, 2019, 171
