@inproceedings{untch1993mutation,
  author={Untch, R.H. and Offutt, A.J. and Harrold, M.J.},
  title={Mutation analysis using mutant schemata},
  booktitle={ACM SIGSOFT Software Engineering Notes},
  year={1993},
  volume={18},
  number={3},
  pages={139--148},
  organization={ACM}
}