@article{vassilladis_cotofana_bertels_1996, 
  title={2-1 addition and related arithmetic operations with threshold logic}, 
  volume={45}, 
  DOI={10.1109/12.537130}, 
  publisher={Institute of Electrical and Electronics Engineers (IEEE)}, 
  author={Vassilladis and Cotofana and Bertels}, 
  year={1996}
  }