Erkebaev Ulukbek ZairbekoVich, Tursunov Dilmurat A. «Asymptotic expansion of the solution of a perturbed elliptic equation when the limit equation has singular points» // Tomsk State University Journal of Mathematics and Mechanics 2015. №3(35) C.26-34
Tursunov Dilmumt A., Erkebaev Ulukbek Z. «Asymptotic expansion of the solution of the Dirichlet problem for a ring with a singularity on the boundary» // Tomsk State University Journal of Mathematics and Mechanics 2016. №1(39) C.42-52
