Z. Zhao, J. Cui, M. Zou, S. Mu, H. Huang, Y. Meng, K. He, K.S. Brinkman, J. Tong. “Novel twin-perovskite nanocomposite of Ba–Ce–Fe–Co–O as a promising triple conducting cathode material for protonic ceramic fuel cells.” Journal of Power Sources 450 (2020): 227609.