Finite Embedded Trees and Simply Connected Mazes cannot be Searched by Halting Finite Automata. - Mathias Bull; Armin Hemmerling (J. Inf. Process. Cybern., 1990)

Traps for Jumping Multihead Counter Automata. - Mathias Bull; Armin Hemmerling (J. Inf. Process. Cybern., 1992)

Knowledge Discovery und Data Mining - Modischer Methodenmix oder Hoffnung auf Bewältigung der Informationsflut? - Lothar Gierl; S. Lange; Mathias Bull (GMDS, 1996)

Case-Based Reasoning and Statistics for Discovering and Forecasting of Epidemics. - Mathias Bull; Günther Kundt; Lothar Gierl (AIME, 1997)

An Early Warning System for Detection and Prediction of Outbreaks of Epidemics. - Mathias Bull; Günther Kundt; Lothar Gierl (Geomed, 1997)

Discovery of Health Risks and Case-Based Forecasting of Epidemics in a Health Surveillance System. - Mathias Bull; Günther Kundt; Lothar Gierl (PKDD, 1997)

CBR in Medicine. - Lothar Gierl; Mathias Bull; Rainer Schmidt 002 (Case-Based Reasoning Technology, 1998)