@article{IVM_1986_11_a9,
     author = {A. N. Churilov},
     title = {On solutions of a~quadratic matrix equation encountered in the investigation of discrete control systems},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {59--65},
     publisher = {mathdoc},
     number = {11},
     year = {1986},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1986_11_a9/}
}