@article{SIGMA_2019_15_a96,
     author = {Boris Khesin and Serge Tabachnikov},
     title = {Fun {Problems} in {Geometry} and {Beyond}},
     journal = {Symmetry, integrability and geometry: methods and applications},
     year = {2019},
     volume = {15},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SIGMA_2019_15_a96/}
}