@article{DE_1990_26_11_a1,
     author = {A. R. Abdullaev and A. B. Burmistrova},
     title = {A generalized {Green} operator and solvability of resonance problems},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1860--1864},
     publisher = {mathdoc},
     volume = {26},
     number = {11},
     year = {1990},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1990_26_11_a1/}
}