@article{ZNSL_1978_75_a9,
     author = {A. N. Kirillov},
     title = {Convex polytopes and formal groups},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {87--90},
     publisher = {mathdoc},
     volume = {75},
     year = {1978},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1978_75_a9/}
}