@misc{ma2008network,
  title={Network Motifs in Object-Oriented Software Systems},
  author={Yutao Ma and Keqing He and Jing Liu},
  year={2008},
  eprint={0808.3292},
  archivePrefix={arXiv},
  primaryClass={cs.SE},
  url={https://arxiv.org/abs/0808.3292}
}