Thermal conductivity of anisotropic spin-1/2 two leg ladder: Green’s function approach Hamed Rezania, Abdollah Langari, Paul H.M. van Loosdrecht and Xenophon Zotos Eur. Phys. J. B, 87 8 (2014) 173 Published online: 01 August 2014 DOI: 10.1140/epjb/e2014-50018-4