Instanton determinant with arbitrary quark mass: WKB phase-shift method and derivative expansion

@article{Dunne2004InstantonDW,
  title={Instanton determinant with arbitrary quark mass: WKB phase-shift method and derivative expansion},
  author={Gerald V. Dunne and Jin Hur and Choonkyu Lee and Hyunsoo Min},
  journal={Physics Letters B},
  year={2004},
  volume={600},
  pages={302-313}
}

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