CONF rabeehkarimimahabadi_ICLR_2021/IDIAP Variational Information Bottleneck for Effective Low-Resource Fine-Tuning Karimi Mahabadi, Rabeeh belinkov, yonatan Henderson, James EXTERNAL https://publications.idiap.ch/attachments/papers/2021/rabeehkarimimahabadi_ICLR_2021.pdf PUBLIC ICLR 2021