@article{FAA_1972_6_3_a2,
     author = {M. G. Gasymov and F. G. Maksudov},
     title = {The principal part of the resolvent of non-self-adjoint operators in a neighborhood of spectral singularities},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {16--24},
     publisher = {mathdoc},
     volume = {6},
     number = {3},
     year = {1972},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_1972_6_3_a2/}
}