Lebedev P.D. Kazakov A.L. Iterative algorithms for constructing the thinnest coverings of polyhedra by sets of different balls // Trudy Instituta Matematiki i Mekhaniki URO RAN. 2021. Vol. 27. No. 1. P. 116–129. DOI: 10.21538/0134-4889-2021-27-1-116-129.
in Russian