S. Arias Guerrero, Sanchez, D. Sanchez, Maas, P. J. M., and Erkens, R. H. J., ?Guatteria darienensis (Annonaceae), a new species from Panama and Colombia?, Phytotaxa, vol. 173, pp. 149?156, 2014.

P. J. M.  Maas, Westra, L. T. Y., Chatrou, L. W., Verspagen, N., Rainer, H., Zamora, N. A., and Erkens, R. H. J., ?Twelve new and exciting Annonaceae from the Neotropics?, PhytoKeys, vol. 126, pp. 25?69, 2019.

T. L. P.  Couvreur, Helmstetter, A. J., Koenen, E. J. M., Bethune, K., Brandão, R. D., Little, S. A., Sauquet, H., and Erkens, R. H. J., ?Phylogenomics of the Major Tropical Plant Family Annonaceae Using Targeted Enrichment of Nuclear Genes?, Frontiers in Plant Science, vol. 9, 2019.

P. J. M.  Maas, Westra, L. Y. Th., Rainer, H., Lobão, A. Q., and Erkens, R. H. J., ?An updated index to genera, species, and infraspecific taxa of Neotropical Annonaceae?, Nordic Journal of BotanyNordic Journal of Botany, vol. 29, pp. 257-356, 2011.

R. H. J.  Erkens, Chatrou, L. W., and Couvreur, T. L. P., ?Radiations and key innovations in an early branching angiosperm lineage (Annonaceae; Magnoliales)?, Botanical Journal of the Linnean SocietyBotanical Journal of the Linnean Society, vol. 169, pp. 117-134, 2012.

R. H. J.  Erkens, Chatrou, L. W., Maas, J. W., van der Niet, T., and Savolainen, V., ?A rapid diversification of rainforest trees (Guatteria; Annonaceae) following dispersal from Central into South America?, Molecular Phylogenetics and EvolutionMolecular Phylogenetics and Evolution, vol. 44, pp. 399-411, 2007.

R. H. J.  Erkens, Westra, L. Y. T. H., and Maas, P. J. M., ?Increasing diversity in the species-rich genus Guatteria (Annonaceae)?, Blumea - Journal of Plant Taxonomy and Plant GeographyBlumea - Journal of Plant Taxonomy and Plant Geography, vol. 53, pp. 467-514, 2008.

T. L. P.  Couvreur, Pirie, M. D., Chatrou, L. W., Saunders, R. M. K., Su, Y. C. F., Richardson, J. E., and Erkens, R. H. J., ?Early evolutionary history of the flowering plant family Annonaceae: steady diversification and boreotropical geodispersal?, Journal of BiogeographyJournal of Biogeography, vol. 38, pp. 664-680, 2011.

L. W.  Chatrou, Erkens, R. H. J., Richardson, J. E., Saunders, R. M. K., and Fay, M. F., ?The natural history of Annonaceae?, Botanical Journal of the Linnean SocietyBotanical Journal of the Linnean Society, vol. 169, pp. 1-4, 2012.

L. W.  Chatrou, Pirie, M. D., Erkens, R. H. J., Couvreur, T. L. P., Neubig, K. M., Abbott, R. J., Mols, J. B., Maas, J. W., Saunders, R. M. K., and Chase, M. W., ?A new subfamilial and tribal classification of the pantropical flowering plant family Annonaceae informed by molecular phylogenetics?, Botanical Journal of the Linnean SocietyBotanical Journal of the Linnean Society, vol. 169, pp. 5-40, 2012.

R. H. J.  Erkens, Chatrou, L. W., and Couvreur, T. L. P., ?Radiations and key innovations in an early branching angiosperm lineage (Annonaceae; Magnoliales)?, Botanical Journal of the Linnean Society, vol. 169, pp. 117-134, 2012.

R. H. J.  Erkens, Mennega, E. A., and Westra, L. T. Y., ?A concise bibliographic overview of Annonaceae?, Botanical Journal of the Linnean Society, vol. 169, pp. 41-73, 2012.

R. H. J.  Erkens, Maas, J. W., and Couvreur, T. L. P., ?From Africa via Europe to South America: migrational route of a species-rich genus of Neotropical lowland rain forest trees (Guatteria, Annonaceae)?, Journal of Biogeography, vol. 36, pp. 2338-2352, 2009.

R. H. J.  Erkens, Chatrou, L. W., Maas, J. W., van der Niet, T., and Savolainen, V., ?A rapid diversification of rainforest trees (Guatteria; Annonaceae) following dispersal from Central into South America?, Molecular Phylogenetics and Evolution, vol. 44, pp. 399-411, 2007.