@article{MZM_2020_107_5_a12,
     author = {A. A. Chilikov and I. Efremov and V. Zverik and N. Khomich},
     title = {A {Combinatorial} {Proof} of {Simplified} {Koll\'ar's} {Theorem} on {Pell's} {Equations}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {796--800},
     publisher = {mathdoc},
     volume = {107},
     number = {5},
     year = {2020},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2020_107_5_a12/}
}