Fahcruddin, I., S. Salmah, and A. Gunawan Malau. “Optimal Control For Malaria Epidemic Model With Vaccinating, Human Treatment And Mosquitos Spraying”. Selecciones Matemáticas, vol. 6, no. 02, Dec. 2019, pp. 189-95, doi:10.17268/sel.mat.2019.02.05.