Abreu, Francisco Luis Gonçalves de, and Adeodato Ari Cavalcante Salviano. “Evaluation of Three Rootstocks Root System for Acid Lime ’tahiti’ at Piauí State”. Semina: Ciências Agrárias, vol. 28, no. 2, Oct. 2007, pp. 187-94, doi:10.5433/1679-0359.2007v28n2p187.