Siqueira, R. et al. (2014) “Plant density, pruning of the lower lateral branches, and production of two cultivars of coffea Arabica and of hybrid ’Icatu’”, Pesquisa Agropecuaria Brasileira, 18(7), pp. 763–769. doi:10.1590/S1678-3921.pab1983.v18.15358.