@article{TM_2008_263_a2,
     author = {V. M. Buchstaber},
     title = {Ring of {Simple} {Polytopes} and {Differential} {Equations}},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {18--43},
     publisher = {mathdoc},
     volume = {263},
     year = {2008},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TM_2008_263_a2/}
}