@article{IVM_1964_2_a7,
     author = {V. A. Gusev},
     title = {On certain matrix differential operators},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {65--73},
     year = {1964},
     number = {2},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1964_2_a7/}
}