@article{yan_fried_mukamel_1989, 
  title={Ultrafast pump-probe spectroscopy: femtosecond dynamics in Liouville space}, 
  volume={93}, 
  DOI={10.1021/j100362a006}, 
  number={25}, 
  publisher={American Chemical Society (ACS)}, 
  author={Yan and Fried and Mukamel}, 
  year={1989}
  }