1. Virovec A.V., Naumov D.U., Merculov A.A., Isaenko L.I., Pashkov V.M. in: Proceedings of the 5th International Conference “Crystals: Growth, Properties, Real Structure” (Medovoi A.I., Poljanskii E.V., eds.), vol. 1, pp. 83–86. Aleksandrov, Russia: VNIISIMS 2001.
2. Proceedings of the SPIE;L.N. Butvina,2002
3. Tarasov V.F., Shakurov G.S.: Appl. Magn. Reson.2, 571–576 (1991)
4. McCausland M.A.H., Mackenzie I.S.: Adv. Phys.28, 305 (1979)
5. Tkachuk A.M., Ivanova S.E., Isaenko L.I., Eliseev A.P., Payne S., Solarz R., Page R., Nostrand M.: Opt. Spektrosk.92, 89–101 (2002)