@article{GraeterSperner2015,
  author    = {Joachim Graeter and Robert P. Sperner},
  title     = {On embedding left-ordered groups into division rings},
  journal   = {Forum mathematicum},
  volume    = {27},
  number    = {1},
  pages     = {485 -- 518},
  doi       = {10.1515/forum-2012-0070},
  year      = {2015},
}