@article{ZNSL_1980_103_a5,
     author = {S. V. Vostokov and V. A. Letsko},
     title = {The canonical decomposition in the group of points of a~formal group},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {52--57},
     year = {1980},
     volume = {103},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1980_103_a5/}
}