Parinya Chalermsook Bundit Laekhanukit Danupon Nanongkai Independent Set, Induced Matching, and Pricing: Connections and Tight (Subexponential Time) Approximation Hardnesses. 370-379 2013 FOCS https://doi.org/10.1109/FOCS.2013.47 https://doi.ieeecomputersociety.org/10.1109/FOCS.2013.47 conf/focs/2013 db/conf/focs/focs2013.html#ChalermsookLN13