Vilà, M., Espinar, J., Hejda, M., Hulme, P., Jarošík, V., Maron, J., Pergl, J., Schaffner, U., Sun, Y., Pyšek, P. (2011) Ecological impacts of invasive alien plants: a meta-analysis of their effects on species, communities and ecosystems.Ecology Letters 14/7: 702-708. http://dx.doi.org/10.1111/j.1461-0248.2011.01628.x