S. M. Tidungan, “Conceptual Mathematics Teaching and Learner Reasoning Support of Key Stage 2 Teachers in Ambaguio, Nueva Vizcaya”, Int. J. Sustain. Integr. Stud., vol. 1, no. 3, pp. 148–160, Oct. 2026, doi: 10.65339/ijsis.V1.I3.148.