Eddie, W. M. M., and C. N. Cupido. “HESPEROCODON, A NEW GENERIC NAME FOR WAHLENBERGIA HEDERACEA (CAMPANULACEAE): PHYLOGENY AND CAPSULE DEHISCENCE”. Edinburgh Journal of Botany, vol. 71, no. 1, Feb. 2014, pp. 63-74, https://doi.org/10.1017/S0960428613000310.