@article{SM_2019_210_8_a4,
     author = {L. V. Lokutsievskiy},
     title = {Convex trigonometry with applications to {sub-Finsler} geometry},
     journal = {Sbornik. Mathematics},
     pages = {1179--1205},
     publisher = {mathdoc},
     volume = {210},
     number = {8},
     year = {2019},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_2019_210_8_a4/}
}