@article{TIMM_2016_22_4_a8,
     author = {V. I. Berdyshev},
     title = {Moving object in $\mathbb{R}^2$ and group of observers},
     journal = {Trudy Instituta matematiki i mehaniki},
     pages = {87--93},
     year = {2016},
     volume = {22},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TIMM_2016_22_4_a8/}
}