@article{FAA_2007_41_4_a8,
     author = {M. I. Ostrovskii and V. A. Khatskevich and V. S. Shulman},
     title = {Operator {Quadratic} {Inequalities} and {Linear} {Fractional} {Relations}},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {83--87},
     publisher = {mathdoc},
     volume = {41},
     number = {4},
     year = {2007},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_2007_41_4_a8/}
}