@article{BrungsGraeter2017,
  author    = {Hans H. Brungs and Joachim Gr{\"a}ter},
  title     = {On central extensions of SL(2, F) admitting left-orderings},
  journal   = {Journal of Algebra},
  volume    = {486},
  pages     = {288 -- 327},
  doi       = {10.1016/j.jalgebra.2017.05.025},
  year      = {2017},
}