@article{ZNSL_2006_338_a3,
     author = {S. V. Vostokov and A. N. Zinoviev},
     title = {Arithmetic of the module of roots of the isogeny of a~formal group in the case of small ramification},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {125--136},
     publisher = {mathdoc},
     volume = {338},
     year = {2006},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2006_338_a3/}
}