Light Fidelity (Li-Fi): Security and Market Sector. - Hikmatyarsyah; Sasono Rahardjo; Juliati Junde (PHOTOPTICS, 2019)

Integration of Downlink Scheme VLC Access Techniques for Low-cost Implementation Indoor Communication System: A Survey. - Hikmatyarsyah; Sasono Rahardjo (PHOTOPTICS, 2022)