@article{IVM_1966_5_a14,
     author = {V. R. Fridlender},
     title = {Polynomial matrices and systems of partial differential equations},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {118--123},
     year = {1966},
     number = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1966_5_a14/}
}