1. The geochemistry of trace elements in marine phosphorites. Part 1. Characteristic abundances and enrichment;Altschuler;Society of Economic Paleontologists and Mineralogists Special Publication,1980
2. The Northern Andes: a review of the Ecuadorian Pacific Margin;Baldock,1985
3. Coniacian–Santonian deep ocean anoxia/euxinia inferred from molecular and inorganic markers: results from the Demerara Rise (ODP Leg 207);Beckmann;Organic Geochemistry,2008
4. Phosphorites – the unsolved problem;Bentor;Society of Economic Paleontologists and Mineralogists Special Publication,1980
5. Geochemistry and origin of phosphorite deposits of Peru and Chile;Burnett;Geological Society of America Bulletin,1977