1. Observations on the grafting of trees, in a letter from Thomas Andrew Knight, Esq. To sir Joseph Banks, Bart PR S;Knight;Philos. Trans. R. Soc. Lond.,1795
2. Ueber die Jugendzustände solcher Pflanzen, welche im Alter vom vegetativen Charakter ihrer Verwandten abweichen., Flora;Hildebrand,1875
3. An essay on juvenility, phase change, and heteroblasty in seed plants;Jones;Int. J. Plant Sci.,1999
4. Organography of plants. Part I. General organography, English;Goebel,1900
5. Further observations on juvenile and adult hedera; further observations on juvenile and adult hedera;Robbins;Am. J. Bot.,1960