Takeuchi, W. 2012.

Modern sequels to the Kaiserin-Augusta-Fluss itinerary of Carl Ledermann: floristic discoveries from the upper Sepik of Papua New Guinea

. Phytotaxa. 60, 1 (Jul. 2012), 17–31. DOI:https://doi.org/10.11646/phytotaxa.60.1.4.