@article{DBLP:journals/tcs/PruhsW07,
author = {Kirk Pruhs and
Gerhard J. Woeginger},
title = {Approximation schemes for a class of subset selection problems},
journal = {Theor. Comput. Sci.},
volume = {382},
number = {2},
year = {2007},
pages = {151-156},
ee = {http://dx.doi.org/10.1016/j.tcs.2007.03.006},
bibsource = {DBLP, http://dblp.uni-trier.de}
}