Hendarto, Deni, and Octavianto Libriana Libriana. “PROTOTIPE SISTEM KENDALI PINTU GERBANG BERBASIS DTMF (DUAL TUNE MULTIPLE FREQUENCY)”. JuTEkS (Jurnal Teknik Elektro dan Sains) 3, no. 1 (April 17, 2016): 10. Accessed February 22, 2025. http://360665.5mvk4.group/index.php/JUTEKS/article/view/325.