Otuaga, P. M. “Rainfall Intensity – Duration Frequency Curves for Maxima Duration Series for Ondo Town, Ondo State, Nigeria”. American Scientific Research Journal for Engineering, Technology, and Sciences, vol. 12, no. 1, Apr. 2015, pp. 66-74, https://asrjetsjournal.org/index.php/American_Scientific_Journal/article/view/595.