Magnetic susceptibility and short-range order in iron pnictides: Anisotropic J1-J2 Heisenberg model Artem A. Vladimirov, Dieter Ihle and Nikolay M. Plakida Eur. Phys. J. B, 87 5 (2014) 112 Published online: 15 May 2014 DOI: 10.1140/epjb/e2014-50152-y