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Kaliszewicz, Anita (Jan 2011). "Interference of asexual and sexual reproduction in the green hydra". Ecological Research. 26 (1): 147–152. doi:10.1007/s11284-010-0771-6. S2CID23257641.
Hemmrich, Georg; Anokhin, Boris; Zacharias, Helmut; Bosch, Thomas (July 2007). "Molecular phylogenetics in Hydra, a classical model in evolutionary developmental biology". Molecular Phylogenetics and Evolution. 44 (1): 281–290. doi:10.1016/j.ympev.2006.10.031. PMID17174108.
Habetha, Matthias; Anton-Erzleben, Friederike; Neumann, Kathrin; Bosch, Thomas (2003). "The Hydra viridis / Chlorella symbiosis. Growth and sexual differentiation in polyps without symbionts". Zoology. 106 (2): 101–108. doi:10.1078/0944-2006-00104. PMID16351895.
Kaliszewicz, Anita (Jan 2011). "Interference of asexual and sexual reproduction in the green hydra". Ecological Research. 26 (1): 147–152. doi:10.1007/s11284-010-0771-6. S2CID23257641.