@article{AA_2021_33_1_a2,
     author = {S. V. Buyalo},
     title = {Symmetries of double ratios and an equation for {M\"obius} structures},
     journal = {Algebra i analiz},
     pages = {67--80},
     publisher = {mathdoc},
     volume = {33},
     number = {1},
     year = {2021},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AA_2021_33_1_a2/}
}