J. Sarruge, H. Haag, G. de Oliveira, and A. Dechen, “ Mineral nutrition of cashewnut tree (Anacardium occidentale L.): II - micronutrient deficiencies (preliminary note) ”, An. Esc. Super. Agr. Luiz de Queiroz, vol. 32, pp. 191–195, Jan. 1975, doi: 10.1590/S0071-12761975000100015.