1. Demetallization of asphaltenes: thermal and catalytic effects with small pore catalysts;Adarme;J. Am. Chem. Soc.,1990
2. Vertical migration of oil in Iraqi oil fields: evidence based on vanadium and nickel concentrations;Al-Shahristani;Geochim. Cosmochim. Acta,1972
3. A review of methods for the demetallization of residual fuel oils;Ali;Fuel Process. Technol.,2006
4. Hydroprocessing Heavy Oils and Residua;Ancheyta,2007
5. Conversion of dibenzothiophene to biphenyl by sulfate reducing bacteria isolated from oil field production facilities;Armstrong;Biotechnol. Lett.,1995