D.L. Hawksworth, M. A. Altieri, Increasing biodiversity to improve insect pest management in agro-ecosystems.Biodiversity of microorganisms and invertebrates: its role in sustainable agriculture. Proceedings of the First Workshop on the Ecological Foundations of Sustainable Agriculture (WEFSA 1), London, UK, 26-27 July 1990.. pp. 165- 182 ,(1991)