Logic, Language, and Computation 8th International Tbilisi Symposium on Logic, Language, and Computation, TbiLLC 2009, Bakuriani, Georgia, September 21-25, 2009. Revised Selected Papers - Bezhanishvili, Nick; Löbner, Sebastian; Schwabe, Kerstin; Spada, Luca (Springer Berlin Heidelberg, 2011)