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2. Boron and Boron-based semiconductors
3. Electrical properties of MB66 compounds
4. T.L. Aselage, in D.D. Allred, C.B. Vining, and G.A. Slack (Eds.), Modern Perspectives on Thermoelectrics and Related Materials: Materials Research Society Proceedings, Vol. 234, Materials Research Society, Pittsburgh, 1991, p. 145.
5. D. Emin, in R. Freer (Ed.), The Physics and Chemistry of Carbides, Nitrides and Borides, Kluwer Academic Publishers, Dordrecht, 1990, p. 691.