@article{WittigDingermannSieglstetteretal.2015,
  author    = {R{\"u}diger Wittig and Theodor Dingermann and Robert Sieglstetter and Yingzhong Xie and Adjima Thiombiano and Karen Hahn-Hadjali},
  title     = {World-wide every fifth vascular plant species is or was used as medicinal or aromatic plant},
  journal   = {Flora et Vegetatio Sudano-Sambesica},
  volume    = {16},
  pages     = {3 -- 9},
  year      = {2015},
}