Cnidaria by Systema Naturea 2000 (Arkistoitu – Internet Archive) The Taxonomicon: Brands, S.J. (comp.) 1989-present. The Taxonomicon. Universal Taxonomic Services, Zwaag, The Netherlands. [1]. luettu 6.5.2012
taxonomicon.taxonomy.nl
Cnidaria by Systema Naturea 2000 (Arkistoitu – Internet Archive) The Taxonomicon: Brands, S.J. (comp.) 1989-present. The Taxonomicon. Universal Taxonomic Services, Zwaag, The Netherlands. [1]. luettu 6.5.2012
web.archive.org
Cnidaria by Systema Naturea 2000 (Arkistoitu – Internet Archive) The Taxonomicon: Brands, S.J. (comp.) 1989-present. The Taxonomicon. Universal Taxonomic Services, Zwaag, The Netherlands. [1]. luettu 6.5.2012