Kutela, B., and E. Kidando. “Towards a Better Understanding of Effectiveness of Bike-Share Programs: Exploring Factors Affecting Bikes Idle Duration”. American Scientific Research Journal for Engineering, Technology, and Sciences, vol. 29, no. 1, Mar. 2017, pp. 33-46, https://asrjetsjournal.org/index.php/American_Scientific_Journal/article/view/2674.