Luo, Y., Ji, J., Sun, X., Cao, L., Wu, Y., Huang, F., Lin, C.-W. and Ji, R. (2021) “Dual-level Collaborative Transformer for Image Captioning”, Proceedings of the AAAI Conference on Artificial Intelligence, 35(3), pp. 2286-2293. doi: 10.1609/aaai.v35i3.16328.