Pazzetti, Gustavo Adolfo, et al. “Aplication of Infra-Red Thermometry to Irrigation of Bean: Growth and Yield”. Pesquisa Agropecuaria Brasileira, vol. 28, no. 12, Dec. 1993, pp. 1371-7, doi:10.1590/S1678-3921.pab1993.v28.4009.