Zhe, W., M. Batumalay, R. Thinakaran, C. K. Chan, G. K. Wen, Z. J. Yu, L. J. Wei, and J. Raman. “A Research on Two-Stage Facial Occlusion Recognition Algorithm Based on CNN”. Engineering, Technology & Applied Science Research, vol. 14, no. 6, Dec. 2024, pp. 18205-12, doi:10.48084/etasr.8736.