Triyono, Budi, Yuli Prasetyo, and Hendrik Kusbandono. 2020. “DUAL AXIS SOLAR TRACKER USING SMART RELAY BASED ASTRONOMY METHOD”. Prosiding Seminar Nasional Terapan Riset Inovatif (SENTRINOV) 6 (1):301-8. https://proceeding.isas.or.id/index.php/sentrinov/article/view/368.