Ioannis Caragiannis Jason A. Covey Michal Feldman Christopher M. Homan Christos Kaklamanis Nikos Karanikolas Ariel D. Procaccia Jeffrey S. Rosenschein On the approximability of Dodgson and Young elections. 1058-1067 2009 SODA http://doi.acm.org/10.1145/1496770.1496885 conf/soda/2009 db/conf/soda/soda2009.html#CaragiannisCFHKKPR09