@article{RitteRosenfeldRohrigetal.1999,
  author    = {Ritte, Gerhard and Rosenfeld, J. and Rohrig, K. and Raschke, Klaus},
  title     = {Rates of sugar uptake by guard cell protoplasts of Pisum sativum L. related to solute requirement for stomatal opening},
  year      = {1999},
  language  = {en}
}
@article{RitteRaschke2003,
  author    = {Ritte, Gerhard and Raschke, Klaus},
  title     = {Metabolite export of isolated guard cell chloroplasts of Vicia faba},
  year      = {2003},
  language  = {en}
}