A two-parameter deformation of the SU (1|1) superalgebra and the XY quantum chain in a magnetic field

@article{Hinrichsen1992ATD,
  title={A two-parameter deformation of the SU (1|1) superalgebra and the XY quantum chain in a magnetic field},
  author={Haye Hinrichsen and Vladimir Rittenberg},
  journal={Physics Letters B},
  year={1992},
  volume={275},
  pages={350-354}
}
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