@article{AA_1989_1_5_a7,
     author = {S. N. Naboko},
     title = {Nontangential boundary values of operator $R$-functions in a~half-plane},
     journal = {Algebra i analiz},
     pages = {197--222},
     year = {1989},
     volume = {1},
     number = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AA_1989_1_5_a7/}
}