@article{IVM_1990_6_a8,
     author = {M. I. Ostrovskii and V. P. Fonf},
     title = {Operators with dense images and extensions of minimal systems},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {45--47},
     publisher = {mathdoc},
     number = {6},
     year = {1990},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1990_6_a8/}
}