@article{ZNSL_2014_430_a0,
     author = {S. S. Afanas'eva and S. V. Vostokov},
     title = {Classification of formal $A$-modules in the case of small ramification},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {5--12},
     publisher = {mathdoc},
     volume = {430},
     year = {2014},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2014_430_a0/}
}