H. P. Astutik, “Analisis Tingkat Kepuasan Masyarakat Terhadap Penerapan Blu-E Sistem (Smart Card) Pada Pelayanan Pengujian Kendaraan Angkutan Barang (Studi Kasus UPT Pengujian Kendaraan Bermotor Dinas Kota Yogyakarta): Analysis Of Community Satisfaction Level Against Application Of Blu-E System (Smart Card) In Goods Transportation Vehicle Testing Services (Case Study Of UPT Testing Motorized Vehicles Yogyakarta City Service)”, n.a. ilm. teknik n.a., vol. 11, no. 3, pp. 210–218, Sep. 2023.