Connectivity and community structure of online and register-based social networksMárton Menyhért, Eszter Bokányi, Rense Corten, Eelke M. Heemskerk, Yuliia Kazmina and Frank W. TakesEPJ Data Sci., 14 1 (2025) 8DOI: https://doi.org/10.1140/epjds/s13688-025-00522-4