1. Allen G., P. Eagles, S. Price. 1990. Conserving Carolinian Canada: Conservation biology in the deciduous forest region. University of Waterloo Press, Waterloo, Canada
2. Archibold O. W., D. Brooks, L. Delanoy. 1997. An investigation of the invasive shrub European buckthorn, Rhamnus cathartica L., near Saskatoon, Saskatchewan. Canadian Field-Naturalist 111:617–621
3. Argus G. W. 1992. The phytogeography of rare vascular plants in Ontario and its bearing on plant conservation. Canadian Journal of Botany 70:469–490
4. Bory G., D. Clair-Maczulajtys. 1980. Production, dissemination and polymorphism of seeds in Ailanthus altissima. Revue Generale de Botanique 88:289–311
5. Byers J. E., S. Reichard, J. M. Randall, I. M. Parker, C. S. Smith, W. M. Lonsdale, I. A. E Atkinson, T. R. Seastedt, M. Williamson, E. Chornesky, D. Hayes. 2002. Directing research to reduce the impacts of nonindigenous species. Conservation Biology 16:630–640