Karwur, S. D., Kolibu, H. S. and Suoth, V. A. (2014) “OBJECT DETECTOR PROTOTYPE USING ULTRASONIC SENSOR FOR INDOOR SECURITY MONITORING SYSTEM”, Jurnal Ilmiah Sains, 14(2), pp. 100–105. doi: 10.35799/jis.14.2.2014.6064.