Geodesic
Integrable models of quantum one-dimensional magnets with $O(n)$ and $Sp(2k)$ symmetry
Teoretičeskaâ i matematičeskaâ fizika, Tome 63 (1985) no. 3, pp. 347-366

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A new family of quantum one-dimensional magnets with $O(n)$ and $Sp(2k)$ symmetry is found. The eigenvalues of the corresponding transfer matrices on a finite lattice are calculated. A generalization of the matrix Bethe ansatz to systems with complicated pseudovacuum is proposed. 
@article{TMF_1985_63_3_a3,
     author = {N. Yu. Reshetikhin},
     title = {Integrable models of quantum one-dimensional magnets with $O(n)$ and $Sp(2k)$ symmetry},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {347--366},
     publisher = {mathdoc},
     volume = {63},
     number = {3},
     year = {1985},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1985_63_3_a3/}
}
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N. Yu. Reshetikhin. Integrable models of quantum one-dimensional magnets with $O(n)$ and $Sp(2k)$ symmetry. Teoretičeskaâ i matematičeskaâ fizika, Tome 63 (1985) no. 3, pp. 347-366. http://geodesic.mathdoc.fr/item/TMF_1985_63_3_a3/