@article{IVM_1989_8_a1,
     author = {V. M. Bruk},
     title = {On the spectrum of differential operators in a~space of vector functions},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {15--21},
     publisher = {mathdoc},
     number = {8},
     year = {1989},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1989_8_a1/}
}