Kumar, S.V., Dogiparthi, K.C., Vanajakshi, L. and Subramanian, S.C. 2017. Integration of exponential smoothing with state space formulation for bus travel time and arrival time prediction. Transport. 32, 4 (Dec. 2017), 358–367. DOI:https://doi.org/10.3846/16484142.2015.1100676.