@article{ZVMMF_1992_32_1_a11,
     author = {Kh. D. Ikramov},
     title = {Block symmetries in spectral problems for matrix bundles},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {153--157},
     year = {1992},
     volume = {32},
     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_1992_32_1_a11/}
}