1. M.E. Rose, Elementary Theory of Angular Momentum (Wiley, New York, 1957)
2. G.W. Ford, G.T. Lewis and J. Mc Connell, Rotational Brownian motion of an asymmetric top. Physical Review A19, 907–919 (1979)
3. J. Mc Connell, The Theory of Nuclear Magnetic Relaxation in Liquids (Cam.bridge Univ. Press, in course of pubication)
4. Ref. 1, eq. (4.28)
5. J. Mc Connell, Rotational Brownian Motion and Dielectric Theory (Academic Press, London, 1980)