@article{VMUMM_1988_1_a7,
     author = {L. M. Luzhina},
     title = {Regular spectral problems in a space of vector functions},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {31--35},
     year = {1988},
     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_1988_1_a7/}
}