- Elina Shishkina, Sergei Sitnik, Transmutations, Singular and Fractional Differential Equations with Applications to Mathematical Physics, 2020, 433

- E. L. Shishkina, A. K. Yusupova, “On Singular Heat Equation”, Diff Equat, 59, no. 12, 2023, 1708

- E. L. Shishkina, Operator Theory and Differential Equations, 2021, 229

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

- Elina Shishkina, Sergei Sitnik, Transmutations, Singular and Fractional Differential Equations with Applications to Mathematical Physics, 2020, 85

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

- E. L. Shishkina, Transmutation Operators and Applications, 2020, 237

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