Budiarti, E., J. T. Lestari, and E. Hagenimana. “The Educational Game ‘MARIO’ for Early Childhood Number Recognition to Improve Cognitive Abilities: Attempts and Problems”. Journal of Teaching and Learning Mathematics, vol. 2, no. 1, July 2024, pp. 08-16, doi:10.22219/jtlm.v1i2.28754.