@InProceedings{l04-p203-211, AUTHOR = {Kirk Pruhs and Gerhard Woeginger}, TITLE = {Approximation schemes for a class of subset selection problems}, YEAR = 2004, ADDRESS = {Buenos Aires, Argentina}, BOOKTITLE = {Proc.~of the 6th Latin American Symposium on Theoretical Informatics (LATIN'04)}, PAGES = {203--211}, KEYWORDS = {}}