@article{o'sullivan_york_noren_asbeck_2005, 
  title={Adaptive duplexer implemented using single-path and multipath feedforward techniques with BST phase shifters}, 
  volume={53}, 
  DOI={10.1109/tmtt.2004.839900}, 
  publisher={Institute of Electrical and Electronics Engineers (IEEE)}, 
  author={O'Sullivan and York and Noren and Asbeck}, 
  year={2005}
  }