@article{ZNSL_2002_286_a1,
     author = {E. P. Golubeva},
     title = {On the {Pellian} equation},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {36--39},
     year = {2002},
     volume = {286},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2002_286_a1/}
}