1. Allison RH, Shirley AW, Smith G (1979) Threshold concentration of nitrous oxide affecting psychomotor performance. Br J Anaesth 51:177
2. American Conference of Governmental Industrial Hygienists (1976) TLVs. Threshold limit values for chemical substances and physical agents in the workroom environment with intended changes. ACGIH, Cincinnati, Ohio p 52
3. Arflni G, Mutti A, Vescovi PP, Ferroni C, Ferrari M, Giardi C, Passeri M, Franchini I (1987) Impaired dopaminergic modulation of pituitary secretion in workers occupationally exposed to styrene: further evidence from PRL response to TRH stimulation. J Occup Med 29:826–830
4. Brandenberger G (1992) Evaluation of the effects of an environmental stress on plasma cortisol: methodological aspects (in French). Trav Hum 55:211–218
5. Bruce DL, Bach MJ (1975) Psychological studies of human performance as affected by traces of enflurane and nitrous oxide. Anesthesiology 42:194