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Gottschling, M., and H. H.  Hilger. 2003. ?First fossil record of transfer cells in angiosperms?. 90:957?959.

Gottschling, M., and H. H.  Hilger. 2001. ?Phylogenetic analysis and character evolution of Ehretia and Bourreria (Ehretiaceae, Boraginales) and their allies based on {ITS1} sequences?. 123:249?268.

Gottschling, M., N.  Diane, H. H.  Hilger, and M.  Weigend. 2004. ?Testing hypotheses on disjunctions present in the primarily woody Boraginales: Ehretiaceae, Cordiaceae, and Heliotropiaceae, inferred from ITS1 sequence data?. Int. J. Plant Sci. 165:S123?S135.

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Gottschling, M., J. S.  Miller, M.  Weigend, and H. H.  Hilger. 2005. ?Congruence of a phylogeny of Cordiaceae (Boraginales) inferred from {ITS1} sequence data with morphology, ecology, and biogeography?. 92:425?437.

Gottschling, M., D. H.  Mai, and H. H.  Hilger. 2002. ?The systematic position of Ehretia fossils (Ehretiaceae, Boraginales) from the European Tertiary and implications for character evolution?. 121:149?156.

Gottschling, M., and H. H.  Hilger. 2004. ?The systematic position of Ehretia cortesia nom. nov. (= Cortesia cuneifolia: Ehretiaceae, Boraginales) inferred from molecular and morphological data?. Taxon 53:919?923.