1. see e.g. C. F. Majkrzak, Physica B 173, 375 (1991); H. Zabel, Applied Physics A 58, 159 (1994).
2. A. van der Graaf, Polarized Neutron Reflectometry on Thin Magnetic Films (Delft University Press, 1997; ISBN: 90-407-1526-2).
3. H. Zabel, “Future trends in heterostructure research with neutron scattering” in Frontiers of Neutron Scattering, ed. Albert Furrer (World Scientific, 2000), p.210.
4. C. F. Majkrzak, Physica B 221, 342 (1996).
5. H. Zabel, R. Siebrecht, and A. Schreyer, Physica B 276, 17 (2000).