Hui, L., X. Li, C. Gong, M. Fang, J. T. Zhou, and J. Yang. “Inter-Class Angular Loss for Convolutional Neural Networks”. Proceedings of the AAAI Conference on Artificial Intelligence, vol. 33, no. 01, July 2019, pp. 3894-01, doi:10.1609/aaai.v33i01.33013894.