C.S. Calude, K. Salomaa, S. Yu: Advances and Trends in Automata and Formal Languages A Collection of Papers in Honour of the 60th Birthday of Helmut Juergensen - J.UCS Special Issue /jucs_8_2/advances_and_trends_in
C.S. Calude, G. Stefanescu: Automata, Logic, and Computability: J.UCS Special Issue Dedicated to Professor Sergiu Rudeanu Festschrift /jucs_6_1/automata_logic_and_computability
C.S. Calude, G. Stefanescu, M. Zimand: Combinatorics and Related Areas A Collection of Papers in Honour of the 65th Birthday of Ioan Tomescu /jucs_13_11/combinatorics_and_related_areas