C. Jagadeeswari, Nagamani.G, Sneha.B and Dr. G. NagaSatish. “Hard Hat Detection Using Deep Learning Techniques”. International Journal of Advanced Science and Technology, Vol. 29, no. 11s, June 2020, pp. 1292 -98, http://sersc.org/journals/index.php/IJAST/article/view/20830.