Gálvez, J. L., J. Dufour, C. Negro, and F. López-Mateos. “Selective Separation of Iron and Chromium from Stainless Steel Spent Pickling”. Revista De Metalurgia, vol. 41, no. Extra, Dec. 2005, pp. 475-8, doi:10.3989/revmetalm.2005.v41.iExtra.1079.