In: ANOXIA : Evidence for Eukaryote Survival and Paleontological Strategies. , ed. by Altenbach, A. V., Bernhard, J. M. and Seckbach, J. Cellular Origin, Life in Extreme Habitats and Astrobiology, 21 . Springer, Dordrecht, The Netherlands, pp. 305-322. ISBN 978-94-007-1895-1