Patalinghug, Joey S., and Alvic A. Arnado. “Mathematics Teachers’ Technological Pedagogical and Content Knowledge and Their Capacity for Differentiated Instruction”. International Journal of Multidisciplinary: Applied Business and Education Research, vol. 2, no. 7, July 2021, pp. 574-86, https://doi.org/10.11594/ijmaber.02.07.05.