Febrilliandika, H Oktaviani, L S Siregar B. Evaluasi Usability Human-Interface Virtual Keyboard Qwerty Berdasarkan Prinsip Ergonomi dengan Metode Focus Group Discussion. ELC [Internet]. 2021Sep.30 [cited 2025Jun.27];15(3):160-7. Available from: https://electrician.unila.ac.id/index.php/ojs/article/view/2238