TY - JOUR AU - Nikolai Kitanine AU - Giridhar Kulkarni TI - Form Factors of the Heisenberg Spin Chain in the Thermodynamic Limit: Dealing with Complex Bethe Roots JO - Symmetry, integrability and geometry: methods and applications PY - 2021 VL - 17 UR - http://geodesic.mathdoc.fr/item/SIGMA_2021_17_a111/ LA - en ID - SIGMA_2021_17_a111 ER -