@article{SIGMA_2021_17_a111,
     author = {Nikolai Kitanine and Giridhar Kulkarni},
     title = {Form {Factors} of the {Heisenberg} {Spin} {Chain} in the {Thermodynamic} {Limit:} {Dealing} with {Complex} {Bethe} {Roots}},
     journal = {Symmetry, integrability and geometry: methods and applications},
     year = {2021},
     volume = {17},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SIGMA_2021_17_a111/}
}