Narimawati, U., C. Aprilia, I. Febriana, R. Juliana, R. Jumansyah, H. Saputra, C. Albar, and M. Fahrezi. “Innovation of Electronic Card-Based Public Transportation Fare Payment Systems”. International Journal of Research and Applied Technology (INJURATECH), Vol. 3, no. 2, Sept. 2023, pp. 334-41, doi:10.34010/injuratech.v3i2.14327.