@article{DAN_1986_287_5_a19,
     author = {V. Yu. Gotlib},
     title = {Scattering by a circular resonator with a narrow slit as a problem of perturbation theory},
     journal = {Doklady Akademii Nauk},
     pages = {1109--1113},
     publisher = {mathdoc},
     volume = {287},
     number = {5},
     year = {1986},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1986_287_5_a19/}
}