@article{krstic_2010, 
  title={Input Delay Compensation for Forward Complete and Strict-Feedforward Nonlinear Systems}, 
  volume={55}, 
  DOI={10.1109/tac.2009.2034923}, 
  publisher={Institute of Electrical and Electronics Engineers (IEEE)}, 
  author={Krstic}, 
  year={2010}
  }