@article{Buttler2005,
  author    = {Karl Peter Buttler},
  title     = {Die Gr{\"u}n-Esche (Fraxinus pennsylvanica subsp. novae-angliae) an der Mainspitze eingeb{\"u}rgert},
  journal   = {Botanik und Naturschutz in Hessen},
  volume    = {18},
  pages     = {15 -- 22},
  year      = {2005},
}