H. Humaira Abu Backer Sidek, A. Amri Jamal, M. Makhtar, and S. Abdullah Fadzli, “Smart Bicycle Sharing System for Non-Commercial Purposes using Time-based One-Time Password Algorithm”, IJET, vol. 7, no. 3.28, pp. 275–277, Aug. 2018, doi: 10.14419/ijet.v7i3.28.23436.