Matttapha, S., and P. CHANTARANOTHAI. “Two New Species of <em>Indigofera </Em>(Leguminosae—Papilionoideae) from Thailand”. Phytotaxa, vol. 129, no. 1, Sept. 2013, pp. 47–52, doi:10.11646/phytotaxa.129.1.4.