TY - JOUR AU - E. F. Lysenko TI - Ramification of cyclic extensions of degree $p^2$ of complete discrete valuation fields of prime characteristic $p$ with imperfect residue field JO - Zapiski Nauchnykh Seminarov POMI PY - 2013 SP - 153 EP - 172 VL - 413 UR - http://geodesic.mathdoc.fr/item/ZNSL_2013_413_a7/ LA - ru ID - ZNSL_2013_413_a7 ER -