Bartoszewicz, A., M. Filipczak, G. Horbaczewska, S. Lindner, and F. Prus-Wiśniowski. “On the Operator of Center of Distances Between the Spaces of Closed Subsets of the Real Line”. Topological Methods in Nonlinear Analysis, Dec. 2023, pp. 1-15, doi:10.12775/TMNA.2023.023.