Birkhofer, K, Arvidsson, F, Ehlers, D, Mader, V L, Bengtsson, J & Smith, H G 2016, ' Organic farming affects the biological control of hemipteran pests and yields in spring barley independent of landscape complexity ' Landscape Ecology, vol 31, pp. 567-579 . DOI: 10.1007/s10980-015-0263-8 Birkhofer, K, Arvidsson, F, Ehlers, D, Mader, V L, Bengtsson, J & Smith, H G 2016, ' Organic farming affects the biological control of hemipteran pests and yields in spring barley independent of landscape complexity ', Landscape Ecology, vol. 31, no. 3, pp. 567-579 . https://doi.org/10.1007/s10980-015-0263-8