@article{AbdissaHeydenreichMidiwoetal.2014,
  author    = {Negera Abdissa and Matthias Heydenreich and Jacob O. Midiwo and Albert Ndakala and Zsuzsanna Majer and Beate Neumann and Hans-Georg Stammler and Norbert Sewald and Abiy Yenesew},
  title     = {A xanthone and a phenylanthraquinone from the roots of Bulbine frutescens, and the revision of six seco-anthraquinones into xanthones},
  journal   = {Phytochemistry letters},
  volume    = {9},
  pages     = {67 -- 73},
  doi       = {10.1016/j.phytol.2014.04.004},
  year      = {2014},
}