Wang, J. ., K. Wei, M. Radfar, W. Zhang, and C. Chung. “Encoding Syntactic Knowledge in Transformer Encoder for Intent Detection and Slot Filling”. Proceedings of the AAAI Conference on Artificial Intelligence, vol. 35, no. 16, May 2021, pp. 13943-51, doi:10.1609/aaai.v35i16.17642.