Kamarowski, Bruno, 		Almeida, Raul, 		Biesseck, Bernardo, 		Granada, Roger, 		Coelho, Luiz, AND 		Menotti, David.
" Hybrid method for active face anti-spoofing based on close-up challenge" <em>Companion Proceedings of the Conference on Graphics, Patterns and Images (SIBGRAPI)</em> [Online], (30 September 2024)