Trong, Le Dinh, et al. “Effect of Annealing Temperature on the Li\(^{ + }\) Ionic Conductivity of La\(_{0.67 - x}\)Li\(_{3x}\)TiO\(_{3 }\)”. <i>Communications in Physics</i>, vol. 19, no. 4, Dec. 2009, pp. 235-42, doi:10.15625/0868-3166/19/4/6409.