Niobium Doping Effects on Performance of BaCo<sub>0.7</sub>Fe<sub>0.3−<i>x</i></sub>Nb<sub><i>x</i></sub>O<sub>3−δ</sub> PerovskitePeijun Shen, Weizhong Ding, Xu Liu et al.|The Journal of Physical Chemistry C|2010Cited by 44