@article{ZNSL_1978_75_a6,
     author = {S. V. Vostokov},
     title = {The second factor in the reciprocity law},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {59--66},
     publisher = {mathdoc},
     volume = {75},
     year = {1978},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1978_75_a6/}
}