Stevens, D.R., L. Wright, and P. Mcgill. “An on-Farm Study of Late Pregnancy and Lactation Performance of Ewe Lambs and Their Progeny on Lucerne or Pasture”. Journal of New Zealand Grasslands 77 (January 1, 2015): 269–274. Accessed October 25, 2025. https://www.nzgajournal.org.nz/index.php/JoNZG/article/view/473.