@article{RM_1998_53_2_a15,
     author = {S. S. Ryshkov},
     title = {The structure of primitive parallelohedra and {Voronoi's} last problem},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {403--405},
     publisher = {mathdoc},
     volume = {53},
     number = {2},
     year = {1998},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_1998_53_2_a15/}
}