Markdown (Informal)
[Learning Combination Features with L1 Regularization](https://aclanthology.org/N09-2025) (Okanohara & Tsujii, NAACL 2009)
ACL
- Daisuke Okanohara and Jun’ichi Tsujii. 2009. Learning Combination Features with L1 Regularization. In Proceedings of Human Language Technologies: The 2009 Annual Conference of the North American Chapter of the Association for Computational Linguistics, Companion Volume: Short Papers, pages 97–100, Boulder, Colorado. Association for Computational Linguistics.