J. de Zulueta, “Commonwealth Bureau of Pastures and Field Crops (CAB), 1978: Measurements of grassland vegetation and animal production. Boletín 52,260 p. (Edición dirigida por L’.tMannerje.) Farnham Royal, Bucks, England. ISBN 0-85198-404-5”, Rev. pastos, vol. 10, no. 1, pp. 187–189, Jun. 2011, Accessed: May 16, 2026. [Online]. Available: https://polired.upm.es/index.php/pastos/article/view/706