1. Shannon, R.H.(ed); Hospital Information Systems; IFIP working conference. North-Holland Amsterdam 1979.
2. van Esmond, J., de Vries Robbe, P.F., Levy, A.H.; Information systems for patient care. North-Holland Amsterdam 1976.
3. Abrahamsson, S., et al; Danderyd hospital computer system 11, total regional system for medical care. Computers in biomedical research 3 1970.
4. Lindberg, D.A.B.; Growth of medical information systems in the United States. Lexington Books Boston, Mass. 1979
5. Collen, M.F. (ed); Hospital computer systems. Wiley New York 1975