References
- Gagne R. M., Briggs L. J. principles of Instructional Design, 2nd edn. Rinehart & Winston, New York, Holt 1979
- Kenny D. Analysis of the bureaucratic unsolicited mountainous paper heap (BUMPH) that general practitioners received in 1994. British Medical Journal 1995; 311: 1705–1706
- Rogers E. M. Diffusion of Innovations, 3rd edn. Free Press, New York 1983