2 literature references for Robynsia macrophylla M.Martens & Galeotti:

Author: Dwyer,J.D. et al.
Year: 1980
Title:
Source: Ann.Missouri Bot.Gard.67(3):523-818 ...Papilionoideae
Author: Sorensen,M.
Year: 1988
Title:
Source: Nord.J.Bot.8(2):167-192 Tax. Revision of Pachyrhizus