Wu, Y., Manabe, Y., Kanda, T., German, D.M., Inoue, K. A method to detect license inconsistencies in large-scale open source projects. IEEE/ACM 12th Working Conference 12th Working Conference on Mining Software Repositories, 324-333 (2015).
Link to the paper
German, D.M., Manabe, Y., Inoue, K. A sentence-matching method for automatic license identification of source code files. Proceedings of the IEEE/ACM International Conference on Automated Software Engineering, 437-446 (2010).
Link to the paper