Blythe, L., A. Craig, C. Estill, and C. Cebra. “Clinical Manifestations of Tall Fescue (Festuca Arundinacea) and Perennial Ryegrass (lolium Perenne) Toxicosis in Oregon and Japan”. NZGA: Research and Practice Series, vol. 13, Jan. 2007, pp. 369-72, doi:10.33584/rps.13.2006.3170.