@ARTICLE {
	AUTHOR = "Marcelo Arenas and Claudio Gutierrez and Jorge P{\'e}rez",
	TITLE ="Some Remarks on the Paper "semQA: SPARQL with Idempotent Disjunction"",
	JOURNAL = "IEEE Transactions on Knowledge and Data Engineering (TKDE)",
	VOLUME = "23",
	NUMBER = "4",
	PAGES = "638-639",
	YEAR = "2011",
	PUBLISHER = "IEEE Press",
	ADDRESS = "Piscataway, NJ, USA",
	ISSN = "1041-4347"
	NOTE = "correspondence paper",
	}