SETIAWATI, S.; ZAHRO, U. A.; ROBBANIYYAH, N. A.; IHWANI, I. L. Design of Facial Expressions Recognition for Academic Presence By Using Backpropagation Artificial Neural Networks Based on Principal Components Analysis. Semeton Mathematics Journal, [S. l.], v. 1, n. 2, p. 97–104, 2024. DOI: 10.29303/semeton.v1i2.240. Disponível em: https://eigen.unram.ac.id/index.php/semeton/article/view/240. Acesso em: 22 nov. 2024.