Sousa, Mariangela de Moraes Messias, et al. “Effect of Fertilization and Limestone Application on Production of Dry Matter and Essential Oil of Long Pepper”. Pesquisa Agropecuaria Brasileira, vol. 36, no. 3, Mar. 2001, pp. 405-9, doi:10.1590/S1678-3921.pab2001.v36.6159.