Ricci, M. dos S. F., Casali, V. W. D., Cardoso, A. A., & Ruiz, H. A. (1995). Nutrient contents of two lettuce cultivars fertilized with organic compost. Pesquisa Agropecuaria Brasileira, 30(8), 1035–1039. https://doi.org/10.1590/S1678-3921.pab1995.v30.4394