The inteligent system. - Walter Fritz (SIGART Newsl., 1984)

The autonomous intelligent system. - Walter Fritz; Ramón García-Martínez; Javier R. Blanqué; Rogelio Adobbati; Alberto Rama; Mario Sarno (Robotics Auton. Syst., 1989)

World view and learning systems. - Walter Fritz (Robotics Auton. Syst., 1992)

Solutions for a Robot Brain. - Walter Fritz (BICA, 2012)