Dong, X., J. Bao, T. Zhang, D. Chen, W. Zhang, L. Yuan, D. Chen, F. Wen, N. Yu, and B. Guo. “PeCo: Perceptual Codebook for BERT Pre-Training of Vision Transformers”. Proceedings of the AAAI Conference on Artificial Intelligence, vol. 37, no. 1, June 2023, pp. 552-60, doi:10.1609/aaai.v37i1.25130.