1. Brown PF, Della Pietra SA, Della Pietra VJ, Mercer RL (1993) The mathematics of statistical machine translation: parameter estimation. Comput Linguist 263–311
2. Tan Z, Wang S, Yang Z, Chen G, Huang X, Sun M, Liu Y (2020) Neural machine translation: a review of methods, resources, and tools. AI Open 5–21
3. Vaswani A, Shazeer N, Parmar N, Uszkoreit J, Jones L, Gomez AN, Kaiser Ł, Polosukhin I (2017) Attention is all you need. arXiv Preprint. arXiv:1706.03762
4. Rubino R, Marie B, Dabre R, Fujita A, Utiyama M, Sumita E (2020) Extremely low-resource neural machine translation for Asian languages. Mach Transl 347–382
5. Chakravarthi A, Raja B (2020) Leveraging orthographic information to improve machine translation of under-resourced languages. PhD diss, NUI Galway