Luebert, F., P.  Jacobs, H. H.  Hilger, and L. A. H.  Muller. 2014. ?Evidence for nonallopatric speciation among closely related sympatric Heliotropium species in the Atacama Desert?. Ecology and Evolution 4(3):266 - 275. Retrieved  (http://onlinelibrary.wiley.com/doi/10.1002/ece3.929/abstract).

Weigend, M., F.  Luebert, F.  Selvi, G.  Brokamp, and H. H.  Hilger. 2013. ?Multiple origins for Hound?s tongues (Cynoglossum L.) and Navel seeds (Omphalodes Mill.) ? The phylogeny of the borage family (Boraginaceae s.str.)?. Molecular Phylogenetics and Evolution 68(3):604 - 618. Retrieved  (http://www.sciencedirect.com/science/article/pii/S1055790313001590).

Luebert, F., H. H.  Hilger, and M.  Weigend. 2011. ?Diversification in the Andes: Age and origins of South American Heliotropium lineages (Heliotropiaceae, Boraginales)?. Molecular Phylogenetics and Evolution 61(1):90 - 102. Retrieved  (http://dx.doi.org/10.1016/j.ympev.2011.06.001).

Luebert, F., G.  Brokamp, J.  Wen, M.  Weigend, and H. H.  Hilger. 2011. ?Phylogenetic relationships and morphological diversity in Neotropical Heliotropium (Heliotropiaceae)?. Taxon 60(3):663 - 680. Retrieved  (http://www.ingentaconnect.com/content/iapt/tax/2011/00000060/00000003/art00004).

Luebert, F., M.  Weigend, and H. H.  Hilger. 2010. ?Epitypification of Heliotropium arborescens L. (Heliotropiaceae)?. Taxon 59(4):1263 - 1266. Retrieved  (http://www.ingentaconnect.com/content/iapt/tax/2010/00000059/00000004/art00023).

Gottschling, M., F.  Luebert, H. H.  Hilger, and J. S.  Miller. 2014. ?Molecular delimitations in the Ehretiaceae (Boraginales)?. Molecular Phylogenetics and Evolution 72:1 - 6. Retrieved  (http://www.sciencedirect.com/science/article/pii/S1055790313004405).

Weigend, M. et al. 2014. ?From capsules to nutlets ? Phylogenetic relationships in the Boraginales?. Cladistics 30(5):508-518. Retrieved  (http://onlinelibrary.wiley.com/doi/10.1111/cla.12061/abstract).