Citation: Fjellvag, H.; Nagai, T.; Morita, Y.; Karppinen, M.; Awana, V.P.S.; Lee, J.-H.; Matsui, Y.; Liu, R.-S.; Chen, J.-M.; Hauback, B.C.; Yamauchi, H. (2006). Hole doping into Co-12s2 copper oxides with s fluorite-structured layers between Cu O2 planes. Journal of Solid State Chemistry, 179, pp. 632-645.