Study on nickel and vanadium removal in thermal conversion of oil sludge and oil shale sludge L.G.S. Sombral, A.C. Pickler, J.R. Aires et C.A. RiehlJ. Phys. IV France, 107 (2003) 1255-1258DOI: https://doi.org/10.1051/jp4:20030528
