1. Brown, P.E., Pietra, S.A.D., Pietra, V.J.D., Mercer, R.L.: The Mathematics of Statistical Machine Translation: Parameter Estimation. Computational Linguistics 16(2), 79–85 (1993)
2. Chen, S.F., Goodman, J.: An empirical study of smoothing techniques for language modeling. Computer Speech and Language 13, 359–394 (1999)
3. Gale, W.A., Sampson, G.: Good-Turing frequency estimation without tears. Journal of Quantitative Linguistics 2, 217–237 (1995)
4. Gatt, A., van der Sluis, I., van Deemter, K.: Evaluating algorithms for the generation of referring expressions using a balanced corpus. In: Proceedings of the 11th European Workshop on Natural Language Generation, pp. 49–56 (2007)
5. Jelinek, F., Mercer, R.L.: Interpolated estimation of Markov source parameters from sparse data. In: Proc. of the Workshop Pattern Recognition in Practice, pp. 381–397. North-Holland, Amsterdam (1980)