Song, K., Wang, B., Feng, Z., Liu, R. and Liu, F. 2020. Controlling the Amount of Verbatim Copying in Abstractive Summarization. Proceedings of the AAAI Conference on Artificial Intelligence. 34, 05 (Apr. 2020), 8902-8909. DOI:https://doi.org/10.1609/aaai.v34i05.6420.