@article{ZNSL_2001_282_a4,
     author = {M. F. Gamal'},
     title = {Quasisimilar weak contractions have isomorphic lattices of invariant subspaces},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {51--65},
     publisher = {mathdoc},
     volume = {282},
     year = {2001},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2001_282_a4/}
}