Niv Buchbinder Joseph Naor R. Ravi 0001 Mohit Singh Approximation Algorithms for Online Weighted Rank Function Maximization under Matroid Constraints. 145-156 2012 ICALP (1) https://doi.org/10.1007/978-3-642-31594-7_13 conf/icalp/2012-1 db/conf/icalp/icalp2012-1.html#BuchbinderNRS12