1. Patil, N., Patil, A., Pawar, B.: Named entity recognition using conditional random fields. Procedia Comput. Sci. 167, 1181–1188 (2020)
2. Pathak, K.: A tour of conditional random field. [online] Towards AI—The Best of Tech, Science, and Engineering (2020). Available at: https://towardsai.net/p/machine-learning/a-tour-of-conditional-random-field-7d8476ce0201. Accessed 24 Sept. 2020
3. Singh, S.: Natural Language Processing for Information Extraction (2018). arXiv, [online] Available at: https://arxiv.org/pdf/1807.02383.pdf. Accessed 20 Jan. 2021
4. Zeroual, I., Lakhouaja, A.: Data science in light of natural language processing: an overview. Procedia Comput. Sci. 127, 82–91 (2018)
5. Sovren.com.: Home (2020). [online] Available at: https://www.sovren.com/. Accessed 24 Sept. 2020