@article{DE_1994_30_3_a7,
     author = {R. M. Bischokov},
     title = {An interior boundary value problem with nonlocal shift for a system of equations of the sex-age structure of a population},
     journal = {Differencialʹnye uravneni\^a},
     pages = {419--424},
     publisher = {mathdoc},
     volume = {30},
     number = {3},
     year = {1994},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1994_30_3_a7/}
}