1. 2007 http://www.aalas.org/pdf/humane_care_and_use_of_laboratory_animals.pdf
2. 2014 www.asp.org/society/resolutions/socialhousing.cfm
3. 2011 http://www.avma.org/issues/animal_welfare/default.asp
4. 2011 https://www.aaalac.org/accreditation/faq_landing.cfm#C6