1. “Double modulation and microstructure of the thermoelectric misfit compound [Ca_2-yLn_yCu_0.7+yCo_1.3-yO_4][CoO_2]_b_{1/b_2} (Ln = Pr, Y and 0y/3)”. Créon N, Pérez O, Hadermann J, Klein Y, Hébert S, Hervieu M, Raveau B, Chemistry of materials 18, 5355 (2006).   http://doi.org/10.1021/cm061163a