@article{DE_1987_23_10_a23,
     author = {R. S. Makin and S. B. Shikhov},
     title = {Completeness of the system of eigenfunctions of the multigroup diffusion approximation of a conditional-critical problem with a homogeneous active zone and an arbitrary reflector},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1812--1815},
     publisher = {mathdoc},
     volume = {23},
     number = {10},
     year = {1987},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1987_23_10_a23/}
}