1. Bärtels, C.C. Tributsch, H. Solar Thermal Energy Cycle Based on Sulfur and Sulfide Oxidizing Bacteria Deutsche Forschungsanstalt für Luft und Raumfahrt E.V. (DLR) Solar Thermal Energy Utilization; German Studies on Technology and Application, Vol.5: Final Reports 1989; Edts: M.Becker, K.-H- Funken, G. Schneider, Springer Verlag 1991
2. Bock, Eberhard; Sand, Wolfgang Applied elctron microscopy on the biogenic destruction of concrete and blocks. Use of the transmission electron microscope for identification of mineral acid producing bacteria Proc. Int. Conf. Cern. Microsc. 8th, 285-302; Edited by: Bayles,J.; Gouda,G.R.; Nisperos,A.; Int.Cem. Microsc. Assoc.: Duncanville, Tex. 1986
3. Chatzitheodoru, G. et al. Thin Photoactive Pyrite Films Mat. Res. Bull., Vol. 21, No. 12, pp. 1481 - 87 1986
4. Davis, A.J.III., Yen,T.F. Feasibility studies of a biochemical desulfurization method Adv. Chem. Ser. 151 (Shale Oil, Tar Sands, Relat. Fuel Sources, Symp., 1974), 137 - 43 1976
5. Fukuyama,Yoji; et al. Deodoration Method Jpn. Kokai Tokkyo Koho, 3pp 1990