@article{ZNSL_2003_302_a4,
     author = {N. Yu. Kuranova},
     title = {Representation of binary quadratic forms by a~quaternary form},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {68--80},
     publisher = {mathdoc},
     volume = {302},
     year = {2003},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2003_302_a4/}
}