@article {gottschling_systematic_2002,
	title = {The systematic position of Ehretia fossils (Ehretiaceae, Boraginales) from the European Tertiary and implications for character evolution},
	volume = {121},
	number = {2},
	year = {2002},
	pages = {149{\textendash}156},
	author = {Marc Gottschling and Mai, D.H. and HH Hilger}
}
