1. CONCAWE (1985) The collection, disposal and regeneration of waste oils and related materials. CONCAWE Report No. 85/53.
2. IARC (1984) IARC Monographs on the Evaluation of the Carcinogenic Risk of Chemicals to Humans. Volume 33 Polynuclear Aromatic Compounds, Part 2 Carbon Blacks, Mineral Oils and Nitroarenes. IARC, Lyon, France.