@article{pagel_fehske_sperling_vogel_2012, 
  title={Strongly entangled light from planar microcavities}, 
  volume={86}, 
  DOI={10.1103/physreva.86.052313}, 
  publisher={American Physical Society (APS)}, 
  author={Pagel and Fehske and Sperling and Vogel}, 
  year={2012}, 
  month={Nov}
  }