J. D. A. Pascasio, E. A. Esparcia, C. M. F. Odulio, and J. D. Ocon, “High Renewable Energy (Solar Photovoltaics and Wind) Penetration Hybrid Energy Systems for Deep Decarbonization in Philippine Off-grid Areas”, Chemical Engineering Transactions, vol. 76, pp. 1135-1140, Oct. 2019.