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2. Progress of research on the chemistry of porphyrins compounds in petroleum;Xu;Chem. Res. Appl.,2001
3. Delayed Coker Design and Operation: Recent Trends and Innovations;Elliot,1996
4. Residue processing;Li,2001
5. Removal of nickel and vanadium from heavy crude oils by exchange reactions;Reynolds;Prepr. Symp.–Am. Chem. Soc. Div. Fuel Chem.,2004