1. Sources of the naturalized grasses and herbs in California grasslands;Baker,1989
2. Patterns, modes and extent of invasions by vertebrates;Brown,1989
3. Accumulation of native parasitoid species on introduced herbivores: a comparison of hosts as natives and hosts as invaders;Cornell;Amer. Nat.,1993
4. The origin of species by natural selection or the preservation of favored races in the struggle for life;Darwin,1872
5. Assembly of species communities;Diamond,1975