@article{ZNSL_1971_20_a5,
     author = {N. K. Kossovski},
     title = {On {Diophantine} representations of the sequence of solutions of {Pell's} equation},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {49--59},
     publisher = {mathdoc},
     volume = {20},
     year = {1971},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1971_20_a5/}
}