GlutenFreePassport–Global Perspectives of Consumers, Hospitality and Food Service Market Research 2008 http://glutenfreepassport.com/wp-content/uploads/2011/02/Executive_Summary1.pdf
Boulder Brands: 5-10% of US wheat-based categories are going to be gluten-free in 3-5 years. 2013. http://www.foodnavigator-usa.com/Markets/Boulder-Brands-5-10-of-US-wheat-based-categories-are-going-to-be-gluten-free-in-3-5-years