Wirawan, P. W., D. Er Riyanto, D. M. K. Nugraheni, and Y. Yasmin. “Graph Database Schema for Multimodal Transportation in Semarang”. Journal of Information Systems Engineering and Business Intelligence, vol. 5, no. 2, Oct. 2019, pp. 163-70, doi:10.20473/jisebi.5.2.163-170.