Single crystal study of the one dimensional Ca3Co2O6 compound: five stable configurations for the Ising triangular latticeA. Maignan, C. Michel, A. C. Masset, C. Martin and B. RaveauEur. Phys. J. B, 15 4 (2000) 657-663DOI: https://doi.org/10.1007/s100510051169