Chi, C., S. Zhang, J. Xing, Z. Lei, S. Z. Li, and X. Zou. “Selective Refinement Network for High Performance Face Detection”. Proceedings of the AAAI Conference on Artificial Intelligence, vol. 33, no. 01, July 2019, pp. 8231-8, doi:10.1609/aaai.v33i01.33018231.