@article{UBHD-69329653,
  author={Gerhard, Ingrid and Roether, Mareile},
  title={Die moderne Portiokappe},
  subtitle={eine alternative Methode zur Kontrazeption},
  year={1996},
  pages={247-258},
  language={ger},
  issn={0341-8677},
  volume={20},
  journal={Gyn{\"a}kologische Praxis},
}