1. Cubic boron nitride - diamond mixed crystals
2. Boron-carbon-nitrogen materials of graphite-like structure
3. The boron content was analyzed by optical emmission spectroscopy with an inductive coupled plasma (OES-ICP), the carbon content according to the method of Wösthoff. Nitrogen and oxygen were determined simultaneously with a N and O Determinator, Modell TC 436, LECO Corp.
4. Diplomarbeit, Universität Stuttgart 1991.