Self-supervised Regularization for Text Classification Meng Zhou author Zechen Li author Pengtao Xie author 2021 text journal article Transactions of the Association for Computational Linguistics continuing MIT Press Cambridge, MA periodical academic journal zhou-etal-2021-self-supervised 10.1162/tacl_a_00389 https://aclanthology.org/2021.tacl-1.39/ 2021 9 641 656