Tsou, C.-H.; Fu, Y.-L. (2002). "Tetrad pollen formation in Annona (Annonaceae): proexine formation andbinding mechanism". American Journal of Botany. 89 (5): 734–747. doi:10.3732/ajb.89.5.734. ISSN0002-9122. PMID21665673.
purdue.edu
hort.purdue.edu
Morton, Julia F (1999-04-02). "Wild Custard Apple". New Crops. Department of Horticulture and Landscape Architecture, Purdue University. pp. 86–88. Archived from the original on 9 May 2008. Retrieved 2008-04-18.
theferns.info
tropical.theferns.info
"Annona montana". Useful Tropical Plants. Retrieved 15 February 2019.
Morton, Julia F (1999-04-02). "Wild Custard Apple". New Crops. Department of Horticulture and Landscape Architecture, Purdue University. pp. 86–88. Archived from the original on 9 May 2008. Retrieved 2008-04-18.
worldcat.org
Tsou, C.-H.; Fu, Y.-L. (2002). "Tetrad pollen formation in Annona (Annonaceae): proexine formation andbinding mechanism". American Journal of Botany. 89 (5): 734–747. doi:10.3732/ajb.89.5.734. ISSN0002-9122. PMID21665673.