@phdthesis{PhD-Thesis_2009_Johnson,
  address = {Cambridge, MA, USA},
  author = {Johnson, Erik D.},
  month = {June},
  school = {Massachusetts Institute of Technology},
  title = {{High-energy Photon Transport Modeling for Oil-well Logging}},
  url = {http://hdl.handle.net/1721.1/53266},
  year = {2009}
}