Edem, I. E., and B. Akinsola. “An approach to assessing human factors related occupational safety using behavioural observation-based indicators: The case of a construction site in Nigeria”. Engineering and Applied Science Research, vol. 49, no. 2, Sept. 2021, pp. 133-45, https://ph01.tci-thaijo.org/index.php/easr/article/view/243526.