1. ADIROVICH, E.I., BENDERSKII, V.A., BRIKENSHTEIN, V.Kh., KOROSTELEV, Y.A.: Investigation of the EPR signal observed during the illumination of boron single crystals. Sov. Phys, Semicond. 5, 13 (1971)
2. APPENHEIMER, S., NIEMYSKI, T., JABLONSKI, R.: Hydrogen sorption. In: Boron (T. Niemyski, ed.) Volume. 3, p. 29 Warsaw: Pol. Sci. Publ. 1970
3. BLOEMBERGEN, N.: The magnetic resonance absorption in conductors. J. Appl. Phys. 23, 1383 (1952)
4. BORCHERT, W., DIETZ, W., HERRMANN, H.: Semiconducting properties of boron, Z. angew. Physik 19, 485 (1965)
5. BRUNGS, R.A., JACOBSMEYER, V.P.: Activation energies of single cryst. β-rhombohedral boron. J. Phys. Chem. Solids 25, 701–6 (1964)