Bartoszewicz, A., Filipczak, M., Horbaczewska, G., Lindner, S., & Prus-Wiśniowski, F. (2023). On the operator of center of distances between the spaces of closed subsets of the real line. Topological Methods in Nonlinear Analysis, 63(2), 413–427. https://doi.org/10.12775/TMNA.2023.023