1. in: Springer Tracts in Modern Physics, Vol. 48, Springer-Verlag Berlin, Heidelberg, New York 1969 (pp. 47, 185).
2. Nachweis ultrarotaktiver gitterschwingungen in Tellur
3. , and , The Physics of Selenium and Tellurium, Pergamon Press, New York 1969.
4. Infra-red lattice bands of trigonal tellurium and selenium
5. Thesis (Inaugural Dissertation Univ. Köln) 1969.