TRAYKOVA, E.; NIKOLOVA, M.; PETROV, P. Gamification in computer modeling and information technologies for 6th grade: functions and formulas in spreadsheets. Mathematics and Education in Mathematics, [S. l.], v. 55, p. 265–271, 2026. DOI: 10.55630/mem.2026.55.265-271. Disponível em: https://smb.math.bas.bg/mem/index.php/memjournal/article/view/194. Acesso em: 5 oct. 2026.