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  Int. J. Recent Educ. Res., vol. 2, no. 1, pp. 111-120, Jan. 2021.