I. Soejanto, S. Soejanto, and Y. Dwi Astanti, “Monte Carlo Simulation of on-Street Parking Retribution Revenue Potential in Sleman Regency Indonesia”, IJET, vol. 7, no. 3.30, pp. 357–360, Aug. 2018, doi: 10.14419/ijet.v7i3.30.18333.