2 literature references for Indigofera digitata Thunb.:

Author: Harvey,W.H. & Sonder,O,W,
Year: 1865
Title:
Source: Flora Capensis Vol.2
Author: Schrire,B.D.
Year: 1991
Title:
Source: Systematic..African Indigofereae PhdThesis.Uni.of Natal,S.A.