"K. Seko,Y. Okimoto,M. Kurashima,R. Fukaya,T. Egawa,T. Ishikawa,K. Onda,S.-Y. Koshihara,T. Kyomen,M. Itoh","Photoinduced Phase Transition in Pr<sub>0:5</sub>Ca<sub>0:5</sub>CoO<sub>3</sub> Studied by Sequential Pulse Excitations",,"Acta Physica Polonica A",,"vol. 121","No. 2","pp. 369-371",2012,May