[1]
KadetsV.М. and Zavarzina, O.O. 2016. Plasticity of the unit ball of $\ell_1$. Visnyk of V. N. Karazin Kharkiv National University. Ser. Mathematics, Applied Mathematics and Mechanics. 83, (Sep. 2016), 4-9. DOI:https://doi.org/10.26565/2221-5646-2016-83-01.