Oke, Sunday Ayoola, and Ifeanyichukwu Ebubechukwu Onyegiri. 2016. “Applying the decision trial and evaluation laboratory method as a decision tool for an effective safety management system in aviation transport”. Engineering and Applied Science Research 43 (4):166-71. https://ph01.tci-thaijo.org/index.php/easr/article/view/43273.