Strgulc Krajšek, Simona, and Marko Novak. “Achenes of Common Ragweed (Ambrosia Artemisiifolia) in Packages of Sunflower Achenes for Outdoor Birds”. Acta Biologica Slovenica, vol. 56, no. 1, July 2013, pp. 3-9, https://doi.org/10.14720/abs.56.1.15545.