Mathematical foundations of computer science 1998 : 23rd International Symposium MFCS '98 : Brno, Czech Republic, August 24-28, 1998 : proceedings - Brim, Luboš, 1952-; Gruska, Jozef, 1933-2025; Zlatuška, Jiří, 1957- (Lecture notes in computer science ;, 1998)