de Juan, D., Meseguer, V. and Lozano, L.J. 1998. Chromium extraction with organic solvents. Part 2. Extraction with TBP and with Primene 81R. Revista de Metalurgia. 34, 4 (Aug. 1998), 319–327. DOI:https://doi.org/10.3989/revmetalm.1998.v34.i4.798.