@article {RQMA16b,
	title = {Formalization of the Pumping Lemma for Context-Free Languages},
	journal = {Journal of Formalized Reasoning},
	volume = {9},
	year = {2016},
	pages = {53-68},
	publisher = {University of Bolonha},
	abstract = {<p>Context-free languages are highly important in computer language processing technology as well as in formal language theory. The Pumping Lemma is a property that is valid for all context-free languages, and is used to show the existence of non context-free languages. This paper presents a formalization, using the Coq proof assistant, of the Pumping Lemma for context-free languages.</p>
},
	url = {https://jfr.unibo.it/article/view/5595},
	attachments = {https://haslab.uminho.pt/sites/default/files/jba/files/16jfr.pdf},
	author = {Marcus V. M. Ramos and Jos{\'e} Bacelar Almeida and Nelma Moreira and Ruy J. G. B. de Queiroz}
}