T. T. Loan and N. N. Long, “Effect of Cr\(^{3+}\) Concentration and Heat-treating Temperature on Structural Property of Cr\(^{3+}\)- doped TiO\(_2\) Nanowires Synthesized by Hydrothermal Method”, Comm. Phys., vol. 24, no. 4, p. 353, Mar. 2015.