Ortega, Elizabeth, Pablo Vergara, Osvaldo Vignolio, and Pedro Laterra. 2000. “Effects of Lotus Tenuis Density Upon the Emergence, Survival and Cover of Cirsium Vulgare”. Ecología Austral 10 (2):143-49. https://ojs.ecologiaaustral.com.ar/index.php/Ecologia_Austral/article/view/1590.