1. Y. Kumzerov and S. Vakhrushev, in Encyclopedia of Nanoscience and Nanotechnology, Vol. 10: Nanostructures within Porous Materials, Ed. by H. S. Nalwa (Academic, New York, 2003), Vol. 10, pp. 1–39.
2. O. V. Mazurin, G. P. Roskova, V. I. Aver’yanov, and T. V. Antropova, Two-Phase Glasses: Structure, Properties, Application (Nauka, Leningrad, 1991) [in Russian].
3. T. V. Antropova, Doctoral Dissertation (Institute of Silicate Chemistry, Russian Academy of Sciences, St. Petersburg, 2005).
4. M. K. Niranjan, J. P. Velev, C.-G. Duan, S. S. Jaswal, and E. Y. Tsymbal, Phys. Rev. B: Condens. Matter 78, 104405 (2008).
5. C.-G. Duan, S. S. Jaswal, and E. Y. Tsymbal, Phys. Rev. Lett. 97, 047201 (2006).