*[http://www.dr.dk/videnom/54ikka/ikka2.htm DR Viden Om: Dyrene der ikke burde være], [http://www.dr.dk/videnom/54ikka/ Hovedadresse: Viden Om- Ikkasøjlerne]
*[http://www.nrm.se/ev/research/tard.html.en Swedish Museum of Natural History: Waterbears (Tardigrades)] Citat: "...The land-living species occur in mosses, lichens, or soil and need water films or water drops for activity... Altogether about 400 species of tardigrades have been described. About 70 species have been recorded from Sweden..."
