@article{zhang_woerkom_guo_freeman_2007, 
  title={Anomaly in photoelectron angular distributions}, 
  volume={76}, 
  DOI={10.1103/physreva.76.015401}, 
  publisher={American Physical Society (APS)}, 
  author={Zhang and Woerkom and Guo and Freeman}, 
  year={2007}, 
  month={Jul}
  }