@article{schwarz_schächinger_adler_goetz_2003, 
  title={Hopelessness Is Associated With Decreased Heart Rate Variability During Championship Chess Games}, 
  volume={65}, 
  DOI={10.1097/01.psy.0000075975.90979.2a}, 
  publisher={Ovid Technologies (Wolters Kluwer Health)}, 
  author={Schwarz and Schächinger and Adler and Goetz}, 
  year={2003}
  }