Wardini, S. U., B. D. Pamungkas, and D. S. N. Afifah. “Development of Mobile Learning Teaching Materials on Opportunities to Improve Students’ Mathematical Communication Skills in Vocational High Schools”. Journal of Instructional and Development Researches, Vol. 4, no. 1, Feb. 2024, pp. 1-10, doi:10.53621/jider.v4i1.272.