1. Alabouvette C, Cordier C (2011) Risks of microbial biocontrol agents and regulation: are they in balance?. In: Ehlers R-U (ed) Regulation of biological control agents. Springer, Dordrecht, pp 157–173
2. Bakker PAHM, Raaijmakers JM, Bloemberg G, Höfte M (2008) New perspectives and approaches in plant growth-promoting rhizobacteria research. Eur J Plant Pathol 119:1–126
3. Bale JS (2011) Regulation of invertebrate biological control agents in Europe: recommendations for a harmonised approach. In: Ehlers R-U (ed) Regulation of biological control agents. Springer, Dordrecht, pp 232–373
4. Berg G, Zachow C, Cardinale M, Müller H (2011) Bacterial ecology and human pathogenicity of plant-associated bacteria. In: Ehlers R-U (ed) Regulation of biological control agents. Springer, Dordrecht, pp 175–189
5. Bigler F, Babendreier D, Kuhlmann U (2006) Environmental impact of invertebrates for biological control of arthropods: methods and risk assessment. CAB International, Wallingford, CT