@article{RM_2019_74_3_a1,
     author = {V. M. Buchstaber and A. P. Veselov},
     title = {Conway topograph, $\mathrm{PGL}_2(\pmb{\mathbb Z})$-dynamics and two-valued groups},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {387--430},
     publisher = {mathdoc},
     volume = {74},
     number = {3},
     year = {2019},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_2019_74_3_a1/}
}