ANILKUMAR, K.; KUMAR, K.; UDAYAN, P. CEPF Western Ghats Special Series: Caralluma bicolour Ramach. et al., (Apocynaceae: Asclepiadoideae) - a rare and little known endemic plant as a new record from Palakkad District, Kerala State, India. Journal of Threatened Taxa, [S. l.], v. 5, n. 15, p. 5007–5009, 2013. DOI: 10.11609/JoTT.o3274.5007-9. Disponível em: https://threatenedtaxa.org/index.php/JoTT/article/view/1531. Acesso em: 24 oct. 2021.