@article{ShephardSengstagLutzetal.1993,
  author    = {S. E. Shephard and C. Sengstag and Werner K. Lutz and C. Schlatter},
  title     = {Mutations in liver DNA of lacI transgenic mice (Big Blue) following subchronic exposure to 2-acetylaminofluorene},
  year      = {1993},
}