Arakelyan, V. M., and V. E. Galstyan. 2005. “SYNTHESIS OF SOLID COMPOUNDS OF Fe$_2$O$_3$–Nb$_2$ AND INVESTIGATION OF THEIR ELECTROPHYSICAL AND PHOTOELECTROCHEMICAL PROPERTIES”. Proceedings of the YSU A: Physical and Mathematical Sciences 39 (2 (207). Yerevan, Armenia:59-65. https://doi.org/10.46991/PYSU:A/2005.39.2.059.