Z. Muktamar, .-. Fahrurrozi, .-. Dwatmadji, N. Setyowati, S. Sudjatmiko, and M. Chozin, “Selected Macronutrient Uptake by Sweet Corn under Different Rates of Liquid Organic Fertilizer in Closed Agriculture System”, Int. J. Adv. Sci. Eng. Inf. Technol., vol. 6, no. 2, pp. 258–261, Apr. 2016.