Tabatabaekoloor, Reza, et al. “Comparison of Efficiencies and Costs of Different Weed Control Methods in Paddy Production in Iran”. International Journal of Agricultural and Biological Engineering, vol. 5, no. 2, June 2012, pp. 28-33, https://ijabe.migration.pkpps06.publicknowledgeproject.org/index.php/ijabe/article/view/516.