Geodesic
Poisson structure of classical $XXZ$-chain
Zapiski Nauchnykh Seminarov POMI, Questions of quantum field theory and statistical physics. Part 7, Tome 161 (1987), pp. 88-97 
E. K. Sklyanin. Poisson structure of classical $XXZ$-chain. Zapiski Nauchnykh Seminarov POMI, Questions of quantum field theory and statistical physics. Part 7, Tome 161 (1987), pp. 88-97. http://geodesic.mathdoc.fr/item/ZNSL_1987_161_a7/
@article{ZNSL_1987_161_a7,
     author = {E. K. Sklyanin},
     title = {Poisson structure of classical $XXZ$-chain},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {88--97},
     year = {1987},
     volume = {161},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1987_161_a7/}
}
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AU  - E. K. Sklyanin
TI  - Poisson structure of classical $XXZ$-chain
JO  - Zapiski Nauchnykh Seminarov POMI
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VL  - 161
UR  - http://geodesic.mathdoc.fr/item/ZNSL_1987_161_a7/
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ID  - ZNSL_1987_161_a7
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%G ru
%F ZNSL_1987_161_a7

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The canonical variables ($\gamma$-variables) for the quasiperiodic classical $XZ$-chain (the lattice Landau–Lifshits equation with the uniaxial anisotropy) are built. The approach proposed by the author for the $XYZ$ model i s used (Zap.Nauch.Semin.LOMI, 150 (1986) 154–180).