William Allen Miller, Elements of Chemistry: Theoretical and Practical, Part III. Organic Chemistry (London, England: John W. Parker and son, 1857), pages 52 and 54互联网档案馆的存檔,存档日期2017-04-24..
cdc.gov
NIOSH Pocket Guide to Chemical Hazards. #0574. NIOSH.
William Allen Miller, Elements of Chemistry: Theoretical and Practical, Part III. Organic Chemistry (London, England: John W. Parker and son, 1857), pages 52 and 54互联网档案馆的存檔,存档日期2017-04-24..