@article{VMUMM_1999_2_a13,
     author = {Kh. Hessami Pilehrood},
     title = {On the {Diophantine} equation $x^2-Ny^2=-1$},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {65--67},
     publisher = {mathdoc},
     number = {2},
     year = {1999},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_1999_2_a13/}
}