@article{VVGUM_2018_21_2_a0,
     author = {A. Yu. Igumnov},
     title = {On preserving the orientation of triangle under quasi-isometric mapping},
     journal = {Matemati\v{c}eska\^a fizika i kompʹ\^uternoe modelirovanie},
     pages = {5--12},
     publisher = {mathdoc},
     volume = {21},
     number = {2},
     year = {2018},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VVGUM_2018_21_2_a0/}
}