Y.  A. Petrov, Torrelles, X., Verna, A., Xu, H., Cossaro, A., Pedio, M., Garcia-Barriocanal, J., Castro, G. R., and Davidson, B. A., ?Surface Octahedral Distortions and Atomic Design of Perovskite Interfaces?, Advanced Materials, vol. 25, pp. 4043?4048, 2013.