BeLLE: Detecting National Differences in Computational Thinking and Computer Science Through an International Challenge. - Heidi Kaarto; Javier Bilbao; Arnold Pears; Valentina Dagiene; Janica Kilpi; Marika Parviainen; Zsuzsa Pluhár; Yasemin Gülbahar; Mikko-Jussi Laakso (CMSC, 2024)