@inproceedings{Cali15,
	Author = {Andrea Cal\`{\i} and Umberto Straccia},
	Booktitle = {Proceedings of the 7th International Conference on Web Intelligence, Mining and Semantics (WIMS-17)},
	Isbn = {978-1-4503-5225-3}, 
	doi = {978-1-4503-5225-3},	
	Location = {Amantea, Italy},	
	Articleno = {33},  
	Pages = {33:1--33:4},
	Publisher = {ACM}, 
	Address = {New York, NY, USA}, 
	Title = {Integration of Deep Web Sources: A Distributed Information Retrieval Approach},
	Url = {http://doi.acm.org/10.1145/3102254.3102291},
	Year = {2017}}