1. Society for Cryobiology home page. http://www.societyforcryobiology.org/mc/page.do.
2. Society for Low Temperature Biology home page. http://www.sltb.info/.
3. Society for Cryosurgery home page. http://www.societyofcryosurgery.org/.
4. ICARIS-INFO CryoPrague 2006. http://www.icaris.info/CryoPrague2006/.
5. IIR Commission C1 Information. http://www.iifiir.org/2encominformations.php?C=c1.