@article{VMUMM_2000_1_a2,
     author = {V. P. Serebryakov},
     title = {On conditions of non-quasiregularity of second-order singular differential operators in a space of vector functions},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {13--16},
     publisher = {mathdoc},
     number = {1},
     year = {2000},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_2000_1_a2/}
}