1. ACGIH (2016) American Conference of Governmental Industrial Hygienists TLVs and BEIs. Threshold Limit Values for Chemical Substances and Physical Agents and Biological Exposure Indices. Cincinnati, p 61
2. ACGIH (2020) American Conference of Governmental Industrial Hygienists TLVs and BEIs. Threshold Limit Values for Chemical Substances and Physical Agents and Biological Exposure Indices. Cincinnati
3. BASF (1987) In vitro cytogenetic investigation of N-vinylpyrrolidone-2 in human lymphocytes. Unpublished result. Report No. 0161/8616, Ludwigshafen am Rhein, Germany
4. BASF (1988) Project No. 40M0280/88405 9
5. BASF (1991) Available under REACh Registration Dossier/1-vinylhexahydro-2H-azepin-2-one (N-vinyl caprolactam)