Biju, P., Josekutty, E., Kambale, S., Augustine, J., & Bruyns, P. (2020).

A new species of Ceropegia (Apocynaceae) from northern Kerala, India

. Phytotaxa, 452(2), 180–184. https://doi.org/10.11646/phytotaxa.452.2.7