1. Arp, G., Thiel, V., Reimer, A., Michaelis, W. and Reitner, J. (1999): Biofilm exopolymers control microbialite formation at thermal springs discharging into the alkaline Pyramid Lake, Nevada, USA.—Sediment. Geol.,126, 159–176, Amsterdam
2. Bergquist, P.R. (1978): Sponges.—268p. Berkeley, Los Angeles (University of California Press)
3. Bonci, M.C., Magnino, G., Pirini Radrizzani, C., and Pronzato R. (1997): Finding ofGeodia (Demospongiae) sterrasters in the Late Miocene of Capella Montei (Alessandria) and comparison with living forms.—Boll. Soc. Paleont. Italiana,35/3, 245–256, Modena
4. Boon, J.J., de Leeuw, J.W., Hoeck, V.G. and Vosjan J.H. (1977): The significance of taxonomical value ofiso- andanteiso-monoenic fatty acids and branched β-hydroxy acids inDesulfovibrio desulfuricans.—J. Bacteriol.,129, 1183–1191
5. Bourque, P.-A. and Gignac, H. (1983): Sponge-constructed stromatactis mud mounds, Silurian of Gaspé, Québec.—J. Sediment. Petrol.,53/2, 0521–0532, Tulsa