@article{VMUMM_1985_6_a5,
     author = {Yu. E. Egorov},
     title = {Removable singularities in boundary conditions for differential equations},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {30--36},
     publisher = {mathdoc},
     number = {6},
     year = {1985},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_1985_6_a5/}
}