@article{Gregor2008,
  author    = {Thomas Gregor},
  title     = {Typisierungen in der Potentilla-collina-Gruppe (Potentilla subgrex Collinae Th. Wolf) : 1. Sippen ohne Zackenhaare},
  journal   = {Kochia},
  volume    = {3},
  pages     = {61 -- 73},
  year      = {2008},
}