Phase transition in Pr0.5Ca0.5CoO3 and related cobaltites J. Hejtmánek, Z. Jirák, O. Kaman, K. Knížek, E. Šantavá, K. Nitta, T. Naito and H. Fujishiro Eur. Phys. J. B, 86 7 (2013) 305 Published online: 03 July 2013 DOI: 10.1140/epjb/e2013-30653-y