Template:Takeuchi, 2012c
- Takeuchi, W. 2012. Modern sequels to the Kaiserin-Augusta-Fluss itinerary of Carl Ledermann: Rhysotoechia welzeniana sp. nov. (Sapindaceae), a remarkable species from the upper Sepik of Papua New Guinea. Phytotaxa 61: 55–60. DOI: 10.11646/phytotaxa.61.1.5
