(en) K. Bremer, E.M. Friis et B. Bremer, « Molecular phylogenetic dating of asterid flowering plants shows early Cretaceous diversification », Systematic Biology, vol. 53, no 3, , p. 496–505 (ISSN1063-5157, PMID15503676, DOI10.1080/10635150490445913, lire en ligne)
(en) K. Bremer, E.M. Friis et B. Bremer, « Molecular phylogenetic dating of asterid flowering plants shows early Cretaceous diversification », Systematic Biology, vol. 53, no 3, , p. 496–505 (ISSN1063-5157, PMID15503676, DOI10.1080/10635150490445913, lire en ligne)
(en) K. Bremer, E.M. Friis et B. Bremer, « Molecular phylogenetic dating of asterid flowering plants shows early Cretaceous diversification », Systematic Biology, vol. 53, no 3, , p. 496–505 (ISSN1063-5157, PMID15503676, DOI10.1080/10635150490445913, lire en ligne)