@article{ZNSL_1977_73_a18,
     author = {O. I. Reinov},
     title = {Certain classes of sets in {Banach} spaces and a topological characterization of operators of type~$RN$},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {224--228},
     publisher = {mathdoc},
     volume = {73},
     year = {1977},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1977_73_a18/}
}