Pineda, Yam M. ; Keller, Hector ; Balderrama-Torrico, Jose ; Meve, Ulrich ; Nürk, Nicolai ; Liede-Schumann, Sigrid: Phylogenetics in Scyphostelma (Apocynaceae: Orthosiinae) and description of new species. In: Willdenowia. Bd. 53 (2023) Heft 1/2 . - S. 83-112. ISSN 1868-6397 DOI der Verlagsversion: https://doi.org/10.3372/wi.53.53201