1. Aizen MA, Feinsinger P (1994) Habitat fragmentation, native insect pollinators, and feral honey bees in argentine ‘Chaco Serrano’. Ecol Appl 4(2):378–392
2. Armbruster WS, Mulder CPH, Baldwin BG, Kalisz S, Wessa B, Nute H (2002) Comparative analysis of late floral development and mating-system evolution in tribe Collinsieae (Scrophulariaceae, s.l.). Amer J Bot 89:37–49
3. Ashman TL, Knight TM, Steets JA et al (2004) Pollen limitation of plant reproduction: ecological and evolutionary causes and consequences. Ecology 85:2408–2421
4. Baker HG (1955) Self-compatibility and establishment after ‘long-distance’ dispersal. Evolution 9:347–349
5. Baker HG, Hurd PD Jr (1968) Intrafloral ecology. Annu Rev Entomol 55:10–18