P. D. Fernandes and H. P. Haag, “ Mineral nutrition of vegetables crops: XXII. nutritional differences between sweet-pepper varieties, Avelar and Ikeda ”, An. Esc. Super. Agr. Luiz de Queiroz, vol. 29, pp. 237–251, Jan. 1972, doi: 10.1590/S0071-12761972000100017.