Ge, Ling, et al. “ProKD: An Unsupervised Prototypical Knowledge Distillation Network for Zero-Resource Cross-Lingual Named Entity Recognition”. Proceedings of the AAAI Conference on Artificial Intelligence, vol. 37, no. 11, June 2023, pp. 12818-26, doi:10.1609/aaai.v37i11.26507.