@article{TIMM_2022_28_4_a5,
     author = {V. I. Berdyshev},
     title = {An observer and a pair of objects enveloping a set of convex regions},
     journal = {Trudy Instituta matematiki i mehaniki},
     pages = {64--70},
     publisher = {mathdoc},
     volume = {28},
     number = {4},
     year = {2022},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TIMM_2022_28_4_a5/}
}