Stevens, D. R., Tozer, K. N., Rhodes, T., Zydenbos, S. M., Dynes, R. A., Manning, M. J., Roberts, A. H., White, M. and Metherell, A. (2019) “Farm systems analysis of two thistles of differing seasonal pasture growth impacts in North Island hill country”, Journal of New Zealand Grasslands, 81, pp. 149–158. doi: 10.33584/jnzg.2019.81.411.