Peter H. Raven. “THE OLD WORLD SPECIES OF LUDWIGIA (INCLUDING HISSIAEA), WITH A SYNOPSIS OF THE GENUS (ONAGRACEAE)”. Reinwardtia 6, no. 4 (July 17, 2025): 327–427. Accessed July 2, 2026. https://biologyjournal.brin.go.id/index.php/reinwardtia/article/view/112.