Vogel Ely, C., Bordignon, S. A. d. L., Iganci, J. R. V., & Boldrini, I. I. (2018). Reasserting the priority of Hypericum cordiforme A.St.-Hil. (Hypericaceae) over H. cordatum (Vell.) N.Robson. Brittonia, 70(4), 379-382. https://doi.org/10.1007/s12228-018-9544-2

Vogel Ely, Cleusa, Sérgio Augusto de Loreto Bordignon, João Ricardo Vieira Iganci, and Ilsi Iob Boldrini. "Reasserting the Priority of Hypericum Cordiforme A.St.-Hil. (Hypericaceae) over H. Cordatum (Vell.) N.Robson." Brittonia 70, no. 4 (2018): 379-382. https://doi.org/10.1007/s12228-018-9544-2.

Vogel Ely, Cleusa, et al. "Reasserting the Priority of Hypericum Cordiforme A.St.-Hil. (Hypericaceae) over H. Cordatum (Vell.) N.Robson." Brittonia, vol. 70, no. 4, 2018, pp. 379-382, https://doi.org/10.1007/s12228-018-9544-2.