2 literature references for Rhynchosia viscosa sensu Brenan:

Author: Gillett,J.B. et al.
Year: 1971
Title:
Source: Papilionoideae.In:Fl.Trop.E.Africa,Milne-Redhead & Polhill
Author: Brenan,J.P.M. & Greenway,P.J.
Year: 1949
Title:
Source: Check-list..Brit.Emp.5.Tanganyika Territory.Imp.For.Inst.Ox.