@article{IM2_1991_36_2_a5,
     author = {L. V. Kuz'min},
     title = {An analog of the {Riemann--Hurwitz} formula for one type of $l$-extensions of algebraic number fields},
     journal = {Izvestiya. Mathematics },
     pages = {325--347},
     publisher = {mathdoc},
     volume = {36},
     number = {2},
     year = {1991},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1991_36_2_a5/}
}