@article{VTAMU_2020_25_131_a4,
     author = {D. A. Serkov},
     title = {On a representation of the solvability set in the retention problem},
     journal = {Vestnik rossijskih universitetov. Matematika},
     pages = {290--298},
     year = {2020},
     volume = {25},
     number = {131},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VTAMU_2020_25_131_a4/}
}