@article{IVM_2012_6_a3,
     author = {S. N. Kiyasov},
     title = {Some cases of efficient factorization of second-order matrix functions},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {36--43},
     publisher = {mathdoc},
     number = {6},
     year = {2012},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_2012_6_a3/}
}