J. R. R. Paynandos, “Validation of the Developed Innovative Supplemental Materials (ISMs) on the Least-learned Competencies in Grade 8 Physics”, Int. J. Multidiscip. Appl. Bus. Edu. Res., vol. 6, no. 3, pp. 1494–1512, Mar. 2025, doi: 10.11594/ijmaber.06.03.34.