N. Kitanine, Jean Michel Maillet, N. A. Slavnov, Véronique Terras. Exact results for the sigma(z) two-point function of the XXZ chain Delta=1/2.
Journal of Statistical Mechanics: Theory and Experiment, IOP Publishing, 2005, pp.L09002.
⟨10.1088/1742-5468/2005/09/L09002⟩.
⟨ensl-00266557⟩