@article{MZM_2017_101_2_a11,
     author = {A. A. Flerov},
     title = {Sets with at {Most} {Two-Valued} {Metric} {Projection} on {a~Normed} {Plane}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {286--301},
     publisher = {mathdoc},
     volume = {101},
     number = {2},
     year = {2017},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2017_101_2_a11/}
}