1. Carbon monoxide exposure in Norwegian rescue helicopters;Busch;Air Med J,2015
2. Lifeliner One aloft in Amsterdam;Slagt;Air Med J,2001
3. US Department of Labor, Occupational Safety & Health Administration (OSHA) Standard OSHA 29 CFR 1910.146. https://www.osha.gov/pls/oshaweb/owasrch.search_form?p_doc_type=STANDARDS&p_toc_level=1&p_keyvalue=1910. Accessed March 15, 2016.
4. Fundamentals of Atmospheric Physics;Salby,1996
5. Gas Alert Max XT II [official operator’s manual]. Honeywell Analytics BW Technologies, Lincolnshire, IL.