@article{TRSPY_1984_163_a30,
     author = {V. A. Popov},
     title = {A~one-sided $K$-functional and its interpolation spaces},
     journal = {Informatics and Automation},
     pages = {196--199},
     publisher = {mathdoc},
     volume = {163},
     year = {1984},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TRSPY_1984_163_a30/}
}