@article{SM_2016_207_8_a2,
     author = {L. A. Beklaryan},
     title = {Groups of line and circle diffeomorphisms. {Criteria} for almost nilpotency and structure theorems},
     journal = {Sbornik. Mathematics},
     pages = {1079--1099},
     publisher = {mathdoc},
     volume = {207},
     number = {8},
     year = {2016},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_2016_207_8_a2/}
}