Dayat Hidayat, Ahmad Wachidul Kohar, Nina Rinda Prihartiwi, Husni Mubarok, and Abebayehu Yohannes. “Design of Learning Activities Using Rigorous Mathematical Thinking (RMT) Approach in Application of Derivatives”. IJORER : International Journal of Recent Educational Research, Vol. 2, no. 1, Jan. 2021, pp. 111-20, doi:10.46245/ijorer.v2i1.75.