Apart from Germany, Kauka found experienced illustrators in Yugoslavia, Italy and Spain. Over the years, they created more than 80 different comic characters under his supervision (for the most important ones see list below). Kauka also published series from other countries, mainly France/Belgium, giving them their first big break in Germany and popularizing them. "Fix und Foxi" was published weekly in Germany with a circulation up to 400,000 per week in the magazine's heyday. Allegedly, a total of over 750 million comic books were sold internationally. Kauka's foxes also appeared in magazine spin-offs, pocket books and albums.