Tang, C., Y. Zhao, G. Wang, C. Luo, W. Xie, and W. Zeng. “Sparse MLP for Image Recognition: Is Self-Attention Really Necessary?”. Proceedings of the AAAI Conference on Artificial Intelligence, vol. 36, no. 2, June 2022, pp. 2344-51, doi:10.1609/aaai.v36i2.20133.