1. R.O. Simmons: Z. Naturforsch. 48a, 415 (1993).
2. R.O. Simmons: ‘Neutron experiments on helium’. In: Erforschung der Dynamik kondensierter Materie mit Synchrotronstrahlung, ed. by E. Burkel, W. Schülke (Univ. Rostok, Rostock 1998), Vol II, pp. F4/1–33.
3. R.C. Blasdell, D.M. Ceperley, R.O. Simmons: Z. Naturforsch. 48a, 433 (1993).
4. D.M. Ceperley, R.C. Blasdell, R.O. Simmons: Phys. Rev. Lett. 77, 115 (1996).
5. K.A. Gernoth: ‘The One-and Two-Body Densities of Crystalline Matter and Bragg and Diffuse Scattering of Neutrons and X-Rays’. In: Particle Scattering, X-Ray Diffraction, and Microstructure of Solids and Liquids, ed. by M. Ristig, K.A. Gernoth (Springer, Berlin 2002).