A- and B-Site Ordering in the A-Cation-Deficient Perovskite Series La<sub>2–<i>x</i></sub>NiTiO<sub>6−δ</sub> (0 ≤ <i>x</i> < 0.20) and Evaluation as Potential Cathodes for Solid Oxide Fuel Cells
Distribution of the number of citations over years.