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Luebert, Federico; Cecchi, Lorenzo; Frohlich, Michael W.; Gottschling, Marc; Guilliams, C. Matt; Hasenstab-Lehman, Kristen E.; Hilger, Hartmut H.; Miller, James S.; Mittelbach, Moritz (2016-06-24). "Familial classification of the Boraginales"(PDF). Taxon. 65 (3): 502–522. doi:10.12705/653.5.
Jeiter, Julius; Danisch, Fränze; Hilger, Hartmut H. (2016). "Polymery and nectary chambers in Codon (Codonaceae): Flower and fruit development in a small, capsule-bearing family of Boraginales". Flora - Morphology, Distribution, Functional Ecology of Plants. 220: 94–102. doi:10.1016/j.flora.2016.02.010.
Luebert, Federico; Cecchi, Lorenzo; Frohlich, Michael W.; Gottschling, Marc; Guilliams, C. Matt; Hasenstab-Lehman, Kristen E.; Hilger, Hartmut H.; Miller, James S.; Mittelbach, Moritz (2016-06-24). "Familial classification of the Boraginales"(PDF). Taxon. 65 (3): 502–522. doi:10.12705/653.5.
Weigend, M.; Hilger, H. H. (2014-10-28). "Codonaceae-a newly required family name in Boraginales". Phytotaxa. 10 (1): 26. doi:10.11646/phytotaxa.10.1.3. ISSN1179-3163.