A. R. Kawser, M. A. Hossain, and M. F. Yeasmin, “Optimizing the Planting Density of Lettuce (Lactuca Sativa) with Tilapia (Oreochromis Niloticus) in a Recirculation Aquaponic System”, Am. J. Agric. Sci. Eng. Technol., vol. 4, no. 1, pp. 1–11, Mar. 2020.