@article{ZNSL_2020_497_a4,
     author = {V. O. Koval'},
     title = {Partitioning of plane sets into $6$ subsets of small diameter},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {100--123},
     publisher = {mathdoc},
     volume = {497},
     year = {2020},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2020_497_a4/}
}