2 literature references for Plectotropis angustifolia Schum. & Thonn.:

Author: Marechal,R. et al.
Year: 1978
Title:
Source: Boissiera 28:1-273 ...Phaseolus et Vigna...
Author: Du Puy,D.J. et al.
Year: 2002
Title:
Source: The Leguminosae of Madagascar. RBG Kew.