Heydari, Payam, Sakineh Varmazyar, Saeid Ahmadi, Seyed Shamseddin Alizadeh, and Afsaneh Fallahi. 2016. “Evaluating the Semi-Quantitative Risk of Occupational Exposure to Chemicals in One of the Petrochemical Industries”. Scientific Journal of Review 5 (7):435-39. http://sjournals.com/index.php/sjr/article/view/87.