@article{Fulda2008,
  author    = {Simone Fulda},
  title     = {Betulinic acid for cancer treatment and prevention},
  journal   = {International journal of molecular sciences},
  volume    = {9},
  number    = {6},
  pages     = {1096 -- 1107},
  doi       = {10.3390/ijms9061096},
  year      = {2008},
}