@article{IVM_1990_2_a7,
     author = {V. A. Kakichev},
     title = {Matrix convolution of power series},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {53--62},
     publisher = {mathdoc},
     number = {2},
     year = {1990},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1990_2_a7/}
}