1. Werheit H, Schmechel R, Boron, 1998, in Landolt-Börnstein, Numerical Data and functional relationships in Science and Technology Group III, Vol. 41C, Springer, Berlin, p 3.
2. Werheit H, Boron Compounds, 2000, Landolt-Börnstein, Numerical Data and functional relationships in Science and Technology Group III, Vol. 41D, Springer, Berlin, p. 1–491.
3. Werheit H, Schmechel R, Boron, 1998, in Landolt-Börnstein, Numerical Data and functional relationships in Science and Technology Group III, Vol. 41C, Springer, Berlin, p 3.
4. Werheit H, Boron Compounds, 2000, Landolt-Börnstein, Numerical Data and functional relationships in Science and Technology Group III, Vol. 41D, Springer, Berlin, p. 1–491.
5. Werheit H, Kuhlmann U, Lundström T 1994, On the insertion of carbon atoms in B12 icosahedra and the structural anisotropy of β-rhombohedral boron and boron carbide, J. Alloys Comp 204, 197.