Ikhsan, Mochamad. “Digitalization of Asset Maintenance Billing through a Vendor Invoicing Portal: Evidence from PT PLN (Persero) UPT Cilegon”. Journal of Accounting, Management, and Economic Studies, vol. 1, no. 1, Jan. 2026, pp. 41-54, https://jurnal.kurniainstitute.com/index.php/james/article/view/11.