83 papers from 26 countries were submitted.
Accepted papers had authors from 18 countries:
Robin C. Purshouse, Cezar Jalbă and Peter John Fleming, Preference-Driven Co-evolutionary Algorithms Show Promise for Many-Objective Optimisation, In Ricardo H. C. Takahashi, Kalyanmoy Deb, Elizabeth Fialho Wanner, and Salvatore Greco (editors), Sixth International Conference on Evolutionary Multi-Criterion Optimization, Springer-Verlag, Lecture Notes in Computer Science No. 6576, pp. 136--150, April 2011.
25 citations (checked on May 2018 in the ISI Web of Science)