@ARTICLE {
	EDITOR = "Ulrich Kohlenbach and Pablo Barcel{\'o} and Ruy de Queiroz",
	TITLE = "Selected Papers from 21st Workshop on Logic, Language, Information and Computation (WoLLIC 2014)",
	JOURNAL = "Information and Computation",
	VOLUME = "255",
	MONTH = "Aug",
	YEAR = "2017",
	PUBLISHER = "Elsevier Science",
	ADDRESS = "Amsterdam, The Netherlands",
	ISSN = "0890-5401"
	}