1. Hops allergy and terpene sensitivity: an occupational disease;Newmark;Ann Allergy,1978
2. Allergens causing occupational asthma: an evidence-based evaluation of the literature;Baur;Int Arch Occup Environ Health,2014
3. Respiratory and immunological findings in brewery workers;Godnic-Cvar;Am J Ind Med,1999
4. Food and Agriculture Organization of the United Nations. FAOSTAT. http://faostat.fao.org/site/339/default.aspx. Accessed March 10, 2014.
5. US Department of Agriculture. National Hop Report. http://www.usahops.org/userfiles/file/Statistics/National%20Hop%20Report-NASS%2012-12.pdf. Accessed March 10, 2014.