@article{zhang_2020_4042991, author = {Zhang, Ling and Jiang, Wenchao and Zhao, Zhiming}, title = {{Short‐text feature expansion and classification based on nonnegative matrix factorization}}, journal = {Int Journal Intelligent Systems}, year = 2020, month = sep, doi = {10.1002/int.22290}, url = {https://doi.org/10.1002/int.22290} }