Refugio, C. N., Galleto, P. G., Noblefranca, C. D., Inoferio, H. V., Macias, A. O., Colina, D. G., & Dimalig, C. Y. (2020). Content knowledge level of elementary mathematics teachers: The case of a school district in the Philippines. Cypriot Journal of Educational Sciences, 15(3), 619–633. https://doi.org/10.18844/cjes.v15i3.4551