Pedrinho, D. R., Bono, J. A. M., Ludwig, J., Martinez, V. R. and de Faria, M. R. (2015) “Cultivation of lettuce fertilized with controlled-release nitrogen fertilizer and urea ”, Bioscience Journal. Uberlândia, MG, 31(4), pp. 997–1003. doi: 10.14393/BJ-v31n4a2015-26122.