@article{FAA_1971_5_2_a5,
     author = {M. G. Krein and G. K. Langer},
     title = {Defect subspaces and generalized resolvents of an {Hermitian} operator in the space $\Pi_\varkappa$},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {59--71},
     publisher = {mathdoc},
     volume = {5},
     number = {2},
     year = {1971},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_1971_5_2_a5/}
}