1. Kraushar M. Nice G. Lowe Z. Chapman R. &MacGowan B.(2012).Control of Canada thistle in CRP and other noncrop acreage. Purdue Extension FNR‐436‐W.https://www.extension.purdue.edu/extmedia/FNR/FNR‐436‐W.pdf
2. Canada thistle control with selective herbicides;McDonald S.;Golf Course Management,2009