2006, International Mathematics Research Notices, Tabuada,G

2006, International Mathematics Research Notices, Tabuada,G

2006, DISCRETE MATHEMATICS, Johnson,CR;Saiago,CM

2006, BULLETIN OF THE AUSTRALIAN MATHEMATICAL SOCIETY, Cordeiro,E;Delgado,M;Fernandes,VH

2006, FIBONACCI QUARTERLY, Brison,OJ;Nogueira,JE

2007, Semigroups and Formal Languages, MALHEIRO,A

2007, ALGEBRA UNIVERSALIS, Bentz,W

2007, Documenta Mathematica, Tabuada,G

2007, Stud Logica, Kahle,R

2007, Stud Logica, Kahle,R