1. Wang, R., Tan, X., Luo, R., Qin, T., Liu, T. (2021). A survey on low-resource neural machine translation. 4636–4643. doi:10.24963/ijcai.2021/629.
2. Improving neural machine translation models with monolingual data;Sennrich,2016
3. Exploiting source-side monolingual data in neural machine translation;Zhang,2016
4. Iterative back-translation for neural machine translation;Hoang,2017
5. Six challenges for neural machine translation;Koehn,2017