Bangun Bonardo Sirait, Nachrowie, and Suprayogi. “Rancang Bangun Penegang Baji Tutup Meriam 57mm/S-60 Berbasis Arduino Uno Dan Sensor Proximity”. SinarFe7, vol. 1, no. 1, July 2018, https://journal.fortei7.org/index.php/sinarFe7/article/view/536.