1. API 2011 a http://www.epa.gov/hpv/pubs/summaries/lubolbse/c14364rr.pdf
2. API 2011 b http://www.petroleumhpv.org/˜/media/petroleumhpv/documents/2011_apr05_lob_cad_final_4-5-2011.pdf?la=en
3. ATSDR (Agency for Toxic Substances and Disease Registry) 1997 http://www.atsdr.cdc.gov/toxprofiles/tp99.pdf
4. Lipoid pneumonia caused by oil mist exposure from a steel rolling tandem mill;Cullen;Am J Ind Med,1981
5. Subchronic inhalation exposures to aerosols of three petroleum lubricants;Dalbey;Am Ind Hyg Assoc J,2001