Effect of epitaxial strain on small-polaron hopping conduction in Pr0.7(Ca0.6Sr0.4)0.3MnO3 thin films. - Jing Wang; Feng-xia Hu; Ying-ying Zhao; Yao Liu; Rong-rong Wu; Ji-rong Sun; Bao-gen Shen (Applied Physics Letters, 2015)