Pang, B., Y. Li, J. Li, M. Li, H. Cao, and C. Lu. “TDAF: Top-Down Attention Framework for Vision Tasks”. Proceedings of the AAAI Conference on Artificial Intelligence, vol. 35, no. 3, May 2021, pp. 2384-92, https://ojs.aaai.org/index.php/AAAI/article/view/16339.