1. Altschuler, Z.S. (1980) The geochemistry of trace metals in marine phosphorites. Part I. Characteristic abundances and enrichment, In: Y.K. Bentor (ed.) Marine Phosphorites. Geochemistry, Occurrence, Genesis. SEPM Special Publication No. 29, pp. 19–30.
2. Arning, E.T., Birgel, D., Brunner, B. and Peckmann, J. (2009a) Bacterial formation of phosphatic laminites off Peru. Geobiology 7: 295–307.
3. Arning, E.T., Lückge, A., Breuer, C., Gussone, N., Birgel, D. and Peckmann, J. (2009b) Genesis of phosphorite crusts off Peru. Mar. Geol. 262: 68–81.
4. Baturin, G.N. (1978) Phosphorites in the Ocean. Smirnov Institute of Oceanology. SSSR Academy of Sciences, Izdatelstvo Nauka, Moscow, 232 pp. (in Russian).
5. Baturin, G.N. (1982) Phosphorites on the Sea Floor. Origin, Composition and Distribution. Developments in Sedimentology 33. Elsevier, Amsterdam, 343 pp.