@article{ZNSL_2002_286_a13,
     author = {O. M. Fomenko},
     title = {Class numbers of indefinite binary quadratic forms and the residual indices of integers modulo~$p$},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {179--199},
     publisher = {mathdoc},
     volume = {286},
     year = {2002},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2002_286_a13/}
}