1. Andow DA, Kareiva PM, Levin SA, Okubo A (1990) An investigation of the invasive European buckthorn, Rhamnus cathartica L., near Saskatoon, Sascatchewan. Can Field-Nat 111:617–621
2. Bascand LD, Jowett GH (1981) Scrubweed cover of South Island agricultural and pastoral land. N Z J Exp Agric 9:307–327
3. Bascand LD, Jowett GH (1982) Scrubweed cover of South Island agricultural and pastoral land 2. Plant distribution and managerial problem status. N Z J Exp Agric 10:455–492
4. Bass DA (1990) Dispersal of the introduced shrub (Crataegus monogyna) by the brushtailed possum (Trichosurus vulpecula). Aust J Ecol 15:227–229
5. Bellingham PJ (1998) Shrub succession and invasibility in a New Zealand montane grassland. Aust J Ecol 23:562–573