Ijomah, Maxwell Azubuike, and Dennis Enegesele. 2017. “On the Use of Unit Root Test to Differentiate Between Deterministic and Stochastic Trend in Time Series Analysis”. American Scientific Research Journal for Engineering, Technology, and Sciences 27 (1):234-46. https://asrjetsjournal.org/index.php/American_Scientific_Journal/article/view/2347.