Liu, Haijun, et al. “Stomatal Conductivity, Canopy Temperature and Evapotranspiration of Maize (Zea Mays L.) to Water Stress in Northeast China”. International Journal of Agricultural and Biological Engineering, vol. 14, no. 2, Apr. 2021, pp. 112-9, https://ijabe.migration.pkpps06.publicknowledgeproject.org/index.php/ijabe/article/view/5289.