@article{KyvernitakisMaulBahlmann2018,
  author    = {Ioannis Kyvernitakis and Holger Maul and Franz Bahlmann},
  title     = {Controversies about the secondary prevention of spontaneous preterm birth},
  journal   = {Geburtshilfe und Frauenheilkunde},
  volume    = {78},
  number    = {6},
  pages     = {585 -- 595},
  doi       = {10.1055/a-0611-5337},
  year      = {2018},
}