@booklet {danlos:hal-01392829,
	title = {Natural Language Processing, 60 years after the Chomsky-Sch{\"u}tzenberger hierarchy},
	year = {2016},
	publisher = {{Robert Cori and Dominique Perrin}},
	keywords = {Formal grammars, Language hierarchy},
	url = {https://hal.inria.fr/hal-01392829},
	author = {Danlos, Laurence and Beno{\^\i}t Crabb{\'e}}
}
