Compact Feynman rules for Majorana fermions

@article{Denner1992CompactFR,
  title={Compact Feynman rules for Majorana fermions},
  author={Ansgar Denner and H. N. van Eck and O. Hahn and Jill Kublbeck},
  journal={Physics Letters B},
  year={1992},
  volume={291},
  pages={278-280}
}
We present simple algorithmic Feynman rules for Majorana fermions. Insisting on a fermion flow through the graphs along fermion lines we only need the familiar Dirac propagator and only vertices without explicit charge-conjugation matrices; moreover, we get the correct relative signs between different interfering Feynman graphs as in the case of Dirac fermions. 
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