Yerizon, Sukestiyarno, Arnellis, Suherman, and K. A. Hevardani. “Analysis of students’ Mental Construction in Understanding the Concept of Partial Derivatives Based on Action-Process-Object-Schema Theory”. Nurture, vol. 18, no. 4, Aug. 2024, pp. 735-49, doi:10.55951/nurture.v18i4.798.