SONGPANICH, P.; HONGTRAKUL, V. Nymphaea  ‘Siam Blue Hardy’: The World’s  First  Blue  Hardy Waterlily . Thai Agricultural Research Journal, [S. l.], v. 27, n. 1, p. 68, 2009. DOI: 10.14456/thaidoa-agres.2009.5. Disponível em: https://li01.tci-thaijo.org/index.php/thaiagriculturalresearch/article/view/91731. Acesso em: 2 oct. 2026.