W. . Mohammed Hassan Khalaf, “Electronic Nose System for Safety Monitoring at Refineries”, J. eng. sustain. dev., vol. 16, no. 4, pp. 220–228, Dec. 2012, Accessed: May 06, 2025. [Online]. Available: https://jeasd.uomustansiriyah.edu.iq/index.php/jeasd/article/view/1237