Richard Steven Immanuel Sihombing, Rafif Nauval Tuah Siregar, Vijay Sitorus, and Timotius Selar Sitompul, “Pengenalan Ekspresi Wajah Menggunakan Convolutional Neural Network (CNN)”, jcsr-politama, vol. 1, no. 6, pp. 89–97, Dec. 2023.