@article{FAA_2016_50_2_a9,
     author = {Yu. A. Neretin},
     title = {On the {Sphericity} of the {Subgroup} $\operatorname{PSL}_2(\mathbb{R})$ in the {Group} of {Diffeomorphisms} of the {Circle}},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {91--94},
     publisher = {mathdoc},
     volume = {50},
     number = {2},
     year = {2016},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_2016_50_2_a9/}
}