Decompositions of signed-graphic matroids

@article{Slilaty2007DecompositionsOS,
  title={Decompositions of signed-graphic matroids},
  author={Daniel C. Slilaty and Hongxun Qin},
  journal={Discrete Mathematics},
  year={2007},
  volume={307},
  pages={2187-2199}
}
We give a decomposition theorem for signed graphs whose frame matroids are binary and a decomposition theorem for signed graphs whose frame matroids are quaternary. 

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