Bangun Bonardo Sirait, Nachrowie, and Suprayogi. 2018. “Rancang Bangun Penegang Baji Tutup Meriam 57mm/S-60 Berbasis Arduino Uno Dan Sensor Proximity”. SinarFe7 1 (1). https://journal.fortei7.org/index.php/sinarFe7/article/view/536.