Spin excitations and thermodynamics of the antiferromagnetic Heisenberg model on the layered honeycomb latticeArtem A. Vladimirov, Dieter Ihle and Nikolay M. PlakidaEur. Phys. J. B, 90 3 (2017) 48DOI: https://doi.org/10.1140/epjb/e2017-70720-9