1. Budevski, E., Bostanov, V., Vitanov, T., et al., Phys. Stat. Sol., 1966, vol. 13, p. 577.
2. Budevski, E., Bostanov, V., Vitanov, T., et al., Electrochim. Acta, 1966, vol. 11, p. 1697.
3. Bostanov, V. and Andreev, P., Bulg. Chem. Comm., 1996–1997, vol. 29, p. 610.
4. Bostanov, V. and Naneva, R., J. Electroanal. Chem., 1986, vol. 208, p. 153.
5. Bostanov, V., Kotzeva, A., and Budevski, E., Bull. Inst. Chem. Phys. Bulg. Acad. Sci., 1967, vol. 6, p. 33.