Rith, M., J. L. . Soliman, N. S. A. . Lopez, A. M. Fillone, and J. B. M. Biona. “Development of Small Area Population Estimation Models for a Developing, Densely Populated Metropolitan Area and Its Applications: A Case Study of Metro Manila”. Engineering and Applied Science Research, vol. 47, no. 2, June 2020, pp. 206-15, https://ph01.tci-thaijo.org/index.php/easr/article/view/209915.