@inproceedings{Collins:2009eq,
  author = "Collins, John",
  title = "{Rapidity divergences and valid definitions of parton densities }",
  doi = "10.22323/1.061.0028",
  booktitle = "Proceedings of LIGHT CONE 2008 Relativistic Nuclear and Particle Physics {\textemdash} PoS(LC2008)",
  year = 2009,
  volume = "061",
  pages = "028"
}