Aprianto, Rizal, et al. “Arduino Based Empty Parking Space Monitoring System Tool Design”. Jurnal Perintis: Pengembangan Riset Inovatif Teknik, Teknologi, Dan Sains, vol. 2, no. 2(Maret-April), Apr. 2026, pp. 72-81, https://ejournal.pktj.ac.id/index.php/perintis/article/view/114.