A. Z. Silva, A. F. Wamser, R. H. Nowaki, A. B. Cecílio Filho, and J. W. Mendoza-Cortez, “Symptoms of Macronutrients Deficiency in Sweet Pepper (Capsicum annuum L.)”, Agrocienc Urug, vol. 21, no. 2, pp. 31–43, Dec. 2017.