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Gottschling, M.; Weigend, M.; Hilger, H. H. Ehretiaceae. Kadereit, J.; Bittrich, V. (编). The Families and Genera of Vascular Plants, Volume 10: Aquifoliales, Boraginales, Bruniales, Dipsacales, Escalloniales, Garryales, Paracryphiales, Solanales (except Convolvulaceae), Icacinaceae, Metteniusaceae, Vahliaceae. Springer. 2016: 165–178 [2021-08-15]. ISBN 978-3-319-28532-0. doi:10.1007/978-3-319-28534-4_12. (原始内容存档于2018-06-07).
Gottschling, M.; Weigend, M.; Hilger, H. H. Ehretiaceae. Kadereit, J.; Bittrich, V. (编). The Families and Genera of Vascular Plants, Volume 10: Aquifoliales, Boraginales, Bruniales, Dipsacales, Escalloniales, Garryales, Paracryphiales, Solanales (except Convolvulaceae), Icacinaceae, Metteniusaceae, Vahliaceae. Springer. 2016: 165–178 [2021-08-15]. ISBN 978-3-319-28532-0. doi:10.1007/978-3-319-28534-4_12. (原始内容存档于2018-06-07).
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Miller, J. S. A Revision of the New World Species of Ehretia (Boraginaceae). Annals of the Missouri Botanical Garden. 1989, 76: 1050–1076. ISSN 0026-6493. doi:10.2307/2399691.