@article{Wittig2015,
  author    = {R{\"u}diger Wittig},
  title     = {Shared species of the spontaneous flora of a West African (Burkina Faso) and a Central European country (Germany)},
  journal   = {Flora et Vegetatio Sudano-Sambesica},
  volume    = {18},
  pages     = {21 -- 27},
  year      = {2015},
}