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Salama, W., A. El-Kammar, M. Saunders, and R. M. C. and Kong, "Microbial pathways and palaeoenvironmental conditions involved in the formation of phosphorite grains, Safaga District, Egypt", Sedimentary Geology, vol. 325, pp. 41-58, 2015. salama_et_al._2015-sed_geol.pdf
Valerian Ciobota˘, Walid Salama, P. V. J. N. T. P. R., and J. P. Ahmed El Kammar, Rania S. Morsy, "Raman investigations of Upper Cretaceous phosphorite and black shale from Safaga District, Red Sea, Egypt", Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, vol. 118, pp. 42-47, 2014. 2014_ciobota_and_salama_et_al_spec._acta.pdf
Salama, W., M. E. Aref, and R. Gaupp, "Spectroscopic characterization of iron ores formed in different geological environments using FTIR, XPS, Mössbauer spectroscopy and thermoanalyses", Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, vol. 136, pp. 1816–1826, 2015. salama_et_al._2015_spec._acta.pdf