Quarks and Leptons Beyond the Third Generation

@article{Frampton2000QuarksAL,
  title={Quarks and Leptons Beyond the Third Generation},
  author={Paul H. Frampton and Phạm Quang Hưng and Marc A. Sher},
  journal={Physics Reports},
  year={2000},
  volume={330},
  pages={263-348}
}
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