Diniz, M. A. 1988. Taxon detail for Markhamia lutea (Benth.) K. Schum. Flora Zambesiaca. Kew Gardens database. FZ volume:8 part:3 (1988) Bignoniaceae by M. A. Diniz.
Online details: http://apps.kew.org/efloras/namedetail.do?qry=namelist&flora=fz&taxon=10544&nameid=27204