Pasqual, M., Ribeiro, V.G. and Ramos, J.D. (2014) “Effect of GA3 and active charcoal on the in vitro rooting of ’Natal’ sweet orange”, Pesquisa Agropecuaria Brasileira, 25(10), pp. 1477–1482. doi:10.1590/S1678-3921.pab1990.v25.13670.