@article{ZNSL_1977_71_a8,
     author = {N. L. Gordeev},
     title = {The ramification groups of infinite $p$-extensions of a~local field},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {96--132},
     publisher = {mathdoc},
     volume = {71},
     year = {1977},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1977_71_a8/}
}