1. Why are Animals Necessary in Biomedical Research?CBRA Fact Sheet http://ca-biomed.org/CSBR/pdf/fs-whynecessary.pdf
2. Sprague Dawley Rat https://www.janvierlabs.com/tl_files/_media/images/FICHE_RESEARCH_MODEL_SPRAGUE_DAWLEY.pdf
3. Sprague Dawley Rat Taconic http://www.taconic.com/user-assets/documents/spraguedawley_booklet.pdf