1. Rearing tardigrades: results and problems;Altiero;Zool. Anz.,2001
2. Electron microscopy on tardigrades. III. The integument;Baccetti;J. Ultrastruct. Res.,1971
3. Die Anabiose der Tardigraden;Baumann;Zool. Syst.,1922
4. Bertolani, R. (1982): Tardigradi (Tardigrada). Vol. 15. Guide per il riconoscimento delle specie animali delle acque interne italiane. CMR, AQ/1/168.
5. Tardigrada. Reproductive Biology of Invertebrates;Bertolani,1994