@article{UZERU_1990_3_a3,
     author = {\'E. A. Mirzakhanyan},
     title = {On some cl asses of mappings of {Hilbert} space subsets},
     journal = {Proceedings of the Yerevan State University. Physical and mathematical sciences},
     pages = {21--28},
     publisher = {mathdoc},
     number = {3},
     year = {1990},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/UZERU_1990_3_a3/}
}