1. Ball, D. M., Hoveland, C. S. and Lacefield, G. D. 1996.Southern forages,, 2nd ed., 264–265. Norcross, GA: Potash and Phosphate Institute and Foundation for Agronomic Research.
2. Diggs, G. M. Jr., Lipscomb, B. L. and O'Kennon, R. J. 1999.Shinners & Mahler's illustrated flora of north central Texas, Fort Worth, TX: Botanical Research Institute of Texas.
3. Ryegrass–Bermudagrass Production and Nutrient Uptake when Combining Nitrogen Fertilizer with Broiler Litter