Lawal AI, Babajide AA, Nwanji TI, Eluyela D. Are Oil Prices Mean Reverting? Evidence from Unit Root Tests with Sharp and Smooth Breaks. IJEEP [Internet]. 2018 Oct. 28 [cited 2024 Dec. 27];8(6):292-8. Available from: https://econjournals.com/index.php/ijeep/article/view/6980