Fischer, Gunter A.; Gravendeel, Barbara; Sieder, Anton; Andriantiana, Jacky; Heiselmayer, Paul; Cribb, Phillip J.; Smidt, Eric de Camargo; Samuel, Rosabelle; Kiehn, Michael (2007). "Evolution of resupination in Malagasy species of Bulbophyllum (Orchidaceae)". Molecular Phylogenetics and Evolution. 45 (1). Elsevier BV: 358–376. doi:10.1016/j.ympev.2007.06.023. ISSN1055-7903.
Fischer, Gunter A.; Gravendeel, Barbara; Sieder, Anton; Andriantiana, Jacky; Heiselmayer, Paul; Cribb, Phillip J.; Smidt, Eric de Camargo; Samuel, Rosabelle; Kiehn, Michael (2007). "Evolution of resupination in Malagasy species of Bulbophyllum (Orchidaceae)". Molecular Phylogenetics and Evolution. 45 (1). Elsevier BV: 358–376. doi:10.1016/j.ympev.2007.06.023. ISSN1055-7903.