@article{DAN_1990_314_1_a28,
     author = {S. S. Ryshkov and R. M. Erdahl},
     title = {Dual systems of integer-valued vectors and their applications},
     journal = {Doklady Akademii Nauk},
     pages = {123--128},
     publisher = {mathdoc},
     volume = {314},
     number = {1},
     year = {1990},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1990_314_1_a28/}
}