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W.  Morawetz, ?Karyosystematics and Evolution of Australian Annonaceae as Compared with Eupomatiaceae, Himantandraceae, and Austrobaileyaceae?, Plant Systematics and EvolutionPlant Systematics and Evolution, vol. 159, pp. 49-79, 1988.

A.  Le Thomas, Morawetz, W., and Waha, M., ?Pollen of palaeo- and neotropical Annonaceae: definition of the aperture by morphological and functional characters?, in Pollen and spores: form and function, S.  Blackmore and Ferguson, I. K., Eds. London: Academic Press., 1986, pp. 375?388.

P.  Leins and Erbar, C., ?Reproductive Morphology in Annonaceae?, in Early floral developmental studies in Annonaceae ? Biosystematics and Ecology Series, vol. 10, W.  Morawetz and Winkler, H., Eds. Wien: Akademie der Wissenschaften, 1996, pp. 1-27.

A.  Le Thomas, Morawetz, W., and Waha, M., ?Pollen of palaeo- and neotropical Annonaceae: definition of the aperture by morphological and functional characters?, in Pollen and spores: form and function, S.  Blackmore and Ferguson, I. K., Eds. London: Academic Press., 1986, pp. 375?388.