Kirch, B.H., G.E. Aiken, and D.E. Spiers. “The Influence of Temperature Variation Upon Vascular Dynamics in Cattle As Measured by Doppler-Image Ultrasonography”. NZGA: Research and Practice Series 13 (January 1, 2007): 391–393. Accessed April 29, 2026. https://www.nzgajournal.org.nz/index.php/rps/article/view/3159.