@article{FAA_1973_7_2_a15,
     author = {S. G. Krein and E. M. Semenov},
     title = {Interpolation of operators of weakened type},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {89--90},
     publisher = {mathdoc},
     volume = {7},
     number = {2},
     year = {1973},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_1973_7_2_a15/}
}