Duelli, P., & Obrist, M. (1995). Comparing surface activity and flight of predatory arthropods in a 5 km transect. In S. Toft & W. Riedel (Eds.), Acta Jutlandica. Natural science series: Vol. 9. Arthropod natural enemies in arable land I. Density, spatial heterogeneity and dispersal (pp. 283-293). Aarhus University Press.
