@article{VTGU_2020_63_a3,
     author = {D. A. Tursunov and M. O. Orozov},
     title = {Asymptotic solution of the {Dirichlet} problem for a ring, when the corresponding unperturbed equation has a regular special circle},
     journal = {Vestnik Tomskogo gosudarstvennogo universiteta. Matematika i mehanika},
     pages = {37--46},
     publisher = {mathdoc},
     number = {63},
     year = {2020},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VTGU_2020_63_a3/}
}