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Barlow, P (2005). "Patterned cell determination in a plant tissue: The secondary phloem of trees". BioEssays. 27 (5): 533–41. doi:10.1002/bies.20214. PMID15832381.
Jones, Cynthia S. (1999-11-01). "An Essay on Juvenility, Phase Change, and Heteroblasty in Seed Plants". International Journal of Plant Sciences. 160 (S6): 105–S111. doi:10.1086/314215. ISSN1058-5893. PMID10572025. S2CID21757481.
Jones, Cynthia S. (1999-11-01). "An Essay on Juvenility, Phase Change, and Heteroblasty in Seed Plants". International Journal of Plant Sciences. 160 (S6): 105–S111. doi:10.1086/314215. ISSN1058-5893. PMID10572025. S2CID21757481.
Jones, Cynthia S. (1999-11-01). "An Essay on Juvenility, Phase Change, and Heteroblasty in Seed Plants". International Journal of Plant Sciences. 160 (S6): 105–S111. doi:10.1086/314215. ISSN1058-5893. PMID10572025. S2CID21757481.