@inproceedings{colombo_mazzuero_soffiantino_ardizzoia_minuco, 
  title={A comprehensive PC solution to heart rate variability analysis in mental stress}, 
  DOI={10.1109/cic.1989.130598}, 
  publisher={IEEE Comput. Soc. Press}, 
  author={Colombo and Mazzuero and Soffiantino and Ardizzoia and Minuco}
  }