1. Institute of Geonics AS CR, IT4 Innovations, Ostrava, Czech Republic.
2. Department of Applied Analysis and ELKH-ELTE Numerical Analysis and Large Networks Research Group, Eötvös Loránd University, Budapest, Hungary; and Department of Analysis, Budapest University of Technology and Economics, Hungary.
3. CentraleSupelec, Université Paris-Saclay, France, and University of Pécs, Pécs, Hungary.