Single-Rooted DAGs in Regular DAG Languages: Parikh Image and Path Languages Martin Berglund author Henrik Björklund author Frank Drewes author 2017-09 text Proceedings of the 13th International Workshop on Tree Adjoining Grammars and Related Formalisms Marco Kuhlmann editor Tatjana Scheffler editor Association for Computational Linguistics Umeå, Sweden conference publication berglund-etal-2017-single https://aclanthology.org/W17-6210/ 2017-09 94 101