@article{SIGMA_2007_3_a32,
     author = {Orlando Ragnisco and Federico Zullo},
     title = {Continuous and {Discrete} {(Classical)} {Heisenberg} {Spin} {Chain} {Revised}},
     journal = {Symmetry, integrability and geometry: methods and applications},
     year = {2007},
     volume = {3},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SIGMA_2007_3_a32/}
}