1. Ko, Y., Seo, J.: Automatic text categorization by unsupervised learning. In: Proceedings of the 18th Conference on Computational linguistics, vol. 1, pp. 453–459 (2000)
2. Zhou, X., Hu, Y., Guo, L.: Text categorization based on clustering feature selection. Proc. Comput. Sci. 31, 398–405 (2014)
3. Lancichinetti, A., Sirer, M.I., Wang, J.X., Acuna, D., Körding, K., Amaral, L.A.N.: High-reproducibility and high-accuracy method for automated topic classification. Phys. Rev. X 5, 011007 (2015)
4. Dorado, R., Sylvie, R.: Semisupervised text classification using unsupervised topic information. In: Proceedings of the Twenty-Ninth International Florida Artificial Intelligence Research Society Conference (FLAIRS), pp. 210–213 (2016)
5. Kim, M., Sayama, H.: Predicting stock market movements using network science: an information theoretic approach. Appl. Netw. Sci. 2, 35 (2017)