Invariants of links in thickened surfaces

@article{Carter2014InvariantsOL,
  title={Invariants of links in thickened surfaces},
  author={J. Scott Carter and Daniel S. Silver and Susan G. Williams},
  journal={Algebraic \& Geometric Topology},
  year={2014},
  volume={14},
  pages={1377-1394}
}
A group invariant for links in thickened closed orientable surfaces is studied. Associated polynomial invariants are dened. The group 

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