@InProceedings{l04-p6-15, AUTHOR = {Eduardo~Sany Laber and Renato Carmo and Yoshiharu Kohayakawa}, TITLE = {Querying Priced Information in Databases: the Conjuntive Case}, ADDRESS = {Buenos Aires, Argentina}, BOOKTITLE = {Proc.~of the 6th Latin American Symposium on Theoretical Informatics (LATIN'04)}, YEAR = 2004, PAGES = {6--15}, KEYWORDS = {}}