@article{IM2_1970_4_2_a1,
     author = {B. N. Delone and N. P. Dolbilin and S. S. Ryshkov and M. I. Shtogrin},
     title = {A new construction in the theory of lattice coverings of an $n$-dimensional space by equal spheres},
     journal = {Izvestiya. Mathematics },
     pages = {293--302},
     publisher = {mathdoc},
     volume = {4},
     number = {2},
     year = {1970},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1970_4_2_a1/}
}