Thermal conductivity of anisotropic spin-1/2 two leg ladder: Green’s function approachHamed Rezania, Abdollah Langari, Paul H.M. van Loosdrecht and Xenophon ZotosEur. Phys. J. B, 87 8 (2014) 173DOI: https://doi.org/10.1140/epjb/e2014-50018-4