S. Sepia, K. Kalsum, A. Haris Sunubi, and M. Munawir, “Reinventing Grammar Pedagogy through Mobile-Assisted Learning: Busuu-Assisted Tense Mastery in an Indonesian Madrasah Tsanawiyah”, ELS-JISH, vol. 9, no. 1, pp. 123–130, Mar. 2026.