Transformers LITE TRANSFORMER WITH LONG-SHORT RANGE ATTENTION ICLR 2020 https://arxiv.org/pdf/2004.11886.pdf PAY LESS ATTENTION WITH LIGHTWEIGHT AND DYNAMIC CONVOLUTIONS 2019 https://arxiv.org/pdf/1901.10430.pdf Neighborhood Attention Transformer 2022 https://github.com/SHI-Labs/Neighborhood-Attention-Transformer/blob/main/NAT.md