@article{Graeter2009,
  author    = {Graeter, Joachim},
  title     = {On extending Pruefer rings in central simple algebras},
  issn      = {0933-7741},
  doi       = {10.1515/Forum.2009.007},
  year      = {2009},
  abstract  = {We give an example of a commutative Prufer domain R with field of fractions F and a quaternion division algebra D with centre F such that R cannot be extended to a Prufer order in D in the sense of [AD]. This shows, that a general extension theorem for Prufer orders in central simple algebras does not exist and finally answers a question given in [MMU]. Moreover, in our example R is a Bezout domain which is the intersection of a countable number of (non-discrete) real valuation rings.},
  language  = {en}
}
@article{GraeterSperner2015,
  author    = {Graeter, Joachim and Sperner, Robert P.},
  title     = {On embedding left-ordered groups into division rings},
  series = {Forum mathematicum},
  volume    = {27},
  journal   = {Forum mathematicum},
  number    = {1},
  publisher = {De Gruyter},
  address   = {Berlin},
  issn      = {0933-7741},
  doi       = {10.1515/forum-2012-0070},
  pages     = {485 -- 518},
  year      = {2015},
  language  = {en}
}