@article{Wille1998,
  author    = {Irith Wille},
  title     = {Symphytum officinale (Boraginaceae) in S{\"u}d- und Mittelhessen : cytologisch-morphologische Untersuchungen zur Abgrenzung der Sippen},
  journal   = {Botanik und Naturschutz in Hessen},
  volume    = {10},
  pages     = {87 -- 119},
  year      = {1998},
}