@article{ZNSL_1977_67_a5,
     author = {A. B. Voronetskii},
     title = {The question of single-class genera of positive binary quadratic forms},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {144--155},
     publisher = {mathdoc},
     volume = {67},
     year = {1977},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1977_67_a5/}
}