Navarro, M. J. ., N. A. Peñafiel, and E. . Magpantay. “Productivity: A Hidden Engine of Growth in Philippine Remittance Inflows under Gravity Model (Pre-Pandemic Period)”. International Journal of Social and Management Studies, vol. 4, no. 2, Apr. 2023, pp. 141-54, doi:10.5555/ijosmas.v4i2.298.