1. Hurst, J. W. The Art and Science of Presentinga Patient’s Problems
2. Arch. Intern. Med., Vol. 128 (1971), 463–465
3. Kroslak, B., Das problemorientierte Krankenblatt, in: Fuchs, G., Jacobitz, K. Wagner, G.: Krankenhausinformationssysteme, Schattauer Verlag, Stuttgart, 1972
4. Reichertz, P. L. The Record Concept in Theory und Practice in the Medical System Hannover, in: COMED, Computer e Medicine 74, Cordani Spa, Milano, 1974, 123–140
5. Roger, f. h., problem-oriented medical records according to the weed. model med., inform., 3., 1978, 113–129