R. Concepcion II, E. Dadios, A. Bandala, J. Cuello, and Y. Kodama, “Hybrid Genetic Programming and Multiverse-based Optimization of Pre-Harvest Growth Factors of Aquaponic Lettuce Based on Chlorophyll Concentration”, Int. J. Adv. Sci. Eng. Inf. Technol., vol. 11, no. 6, pp. 2128–2138, Dec. 2021.