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Natalie, Cusimano and Josef, Bogner and Simon J., Mayo and Boyce, P.C and Wong, Sin Yeng and Michael, Hesse and Wilbert L. A., Hetterscheid and Richard C., Keating and Jim C., French (2011) Relationships within the Araceae: comparison of morphological patterns with molecular phylogenies. American Journal of Botany, 98 (4). pp. 1-15. ISSN 1537-2197
Wong, Sin Yeng and Josef, Bogner and Boyce, P.C (2011) A new endemic species of Schismatoglottis (Araceae) from the Philippines. Willdenowia, 41 (1). pp. 101-103. ISSN 1868-6397
Josef, Bogner and Peter C., Boyce (2009) Studies on the Schismatoglottideae (Araceae) of Borneo VI : A New Schismatoglottis Species from Sarawak, Malaysian Borneo. Garden's Bulletin Singapore, 60 (2). pp. 1-9. ISSN 2382-5812
Wolfram, Lobin and Michael, Neumann and Josef, Bogner and Boyce, P.C (2007) A new Arum species (Areae, Araceae) from NE Turkey and Georgia. Willdenowia, 37 (2). pp. 445-449. ISSN 1868-6397