Thomsen, P. V. (Ed.), Hansen, G.
, Krogh, L., Lund, K. B., Pedersen, P. B., Touborg, J. P., Wurtz, N. H. & Østergaard, O. (1993).
Eksperimentets rolle i fysikundervisningen. Institut for Fysik og Astronomi.
Kragh, H. (1993).
Steady state theory. In
Encyclopedia of Cosmology: Historical, Philosophical and Scientific Foundations of Modern Cosmology (pp. 629-636). Garland Science.