1. , and , Interstitial Compounds of Boron and Transition Metals, ONR-TR3 (Contract Nonr–4075(00), Task NR056–449), Carborundum Co., Niagara Falls, N.Y., 1964.
2. The crystal structure of a simple rhombohedral form of boron
3. RHOMBOHEDRAL ELEMENTAL BORON
4. , and , Boron, Synthesis Structure and Properties, Plenum Press, New York 1960 (p. 94).
5. AFSC Ad Hoc Task Force, Report of Boron Working Group: Technical Exposition on Boron Filaments and Composites, Vol. 1, Oct. 1964 (p. III—4).