@article{IM2_2025_89_1_a2,
     author = {M. A. Korolev},
     title = {On the period of the continued fraction expansion for $\sqrt{d}$},
     journal = {Izvestiya. Mathematics },
     pages = {26--49},
     publisher = {mathdoc},
     volume = {89},
     number = {1},
     year = {2025},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_2025_89_1_a2/}
}