@article{KUTGS_1990_20_a3,
     author = {A. I. Egorov},
     title = {On the problem of classifying metric spaces of linear elements with respect to admissible groups of motions $G_r$},
     journal = {Trudy Geometricheskogo Seminara},
     pages = {31--39},
     publisher = {mathdoc},
     volume = {20},
     year = {1990},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/KUTGS_1990_20_a3/}
}