@article{ZNSL_2007_350_a7,
     author = {V. G. Zhuravlev},
     title = {The {Pell} equation over the $\circ${-Fibonacci} ring},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {139--159},
     year = {2007},
     volume = {350},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2007_350_a7/}
}