Dechen, A. et al. 1980. Mineral nutrition of vegetable crops: XXXVI. effects of calcium levels in nutrient solution upon the concentration of B, Cu, Fe, Mn and Zn in tomato plants (Lycopevsicon esculentum Mill) . Anais da Escola Superior de Agricultura Luiz de Queiroz. 37, 2 (Jan. 1980), 1077–1103. DOI:https://doi.org/10.1590/S0071-12761980000200029.