@article{HallstroemJanke2010,
  author    = {Bj{\"o}rn M. Hallstr{\"o}m and Axel Janke},
  title     = {Mammalian evolution may not be strictly bifurcating},
  journal   = {Molecular Biology and Evolution},
  volume    = {27},
  number    = {12},
  pages     = {2804 -- 2816},
  doi       = {10.1093/molbev/msq166},
  year      = {2010},
}