Nyoman, Purnama, and Putu Kusuma Negara. “Deteksi Masker Pencegahan Covid19 Menggunakan Convolutional Neural Network Berbasis Android”. Jurnal RESTI (Rekayasa Sistem dan Teknologi Informasi) 5, no. 3 (June 26, 2021): 576 - 583. Accessed September 19, 2021. https://jurnal.iaii.or.id/index.php/RESTI/article/view/3103.