| Roy Helen E., Migeon A. (2010) Non-native coccinellids in Europe. In: DAISIE: Non-natives invertebrates in Europe (ed. A. Roques).. BioRisk, Springer Academic Publishers, Netherlands 4, 293–313 |
| Brown Peter M. J. (2010) The spread of the harlequin ladybird Harmonia axyridis (Coleoptera: Coccinellidae) in Europe and its effect on native ladybirds. , Anglia Ruskin University, , |
| Ribbands B., Brown Peter M. J., Roy Helen E., Majerus Michael E. N. (2009) The most northerly record of the harlequin ladybird (Col., Coccinellidae) in the British Isles.. Entomologist's Monthly Magazine, , 145, 43-44 |
| Roy Helen E., Wajnberg Eric, Roy Helen E., Wajnberg Eric (2008) From biological control to invasion: the ladybird Harmonia axyridis as a model species. From Biological Control to Invasion: the Ladybird Harmonia axyridis as a Model Species, Springer Netherlands, Dordrecht , 1-4 |
| Brown Peter M. J., Adriaens Tim, Bathon H., Cuppen J., Goldarazena A., Hägg T., Kenis Marc, Klausnitzer B. E. M., Kovář I., Loomans Antoon J. M., Majerus Michael E. N., Nedved O., Pedersen J., Rabitsch W., Roy Helen E., Ternois V., Zakharov I. A., Roy D. B. (2008) Harmonia axyridis in Europe: spread and distribution of a non-native coccinellid. BioControl, , 53, 5-21 |
| Brown Peter M. J., Roy Helen E., Rothery Peter, Roy D. B., Ware Remy L., Majerus Michael E. N., Roy Helen E., Wajnberg Eric (2008) Harmonia axyridis in Great Britain: analysis of the spread and distribution of a non-native coccinellid. From Biological Control to Invasion: the Ladybird Harmonia axyridis as a Model Species, Springer Netherlands, , 55-67 |
| Brown Peter M. J., James Trevor J., Stewart Alan JA, Roy Helen E. (2008) Mapping insect distributions in the 21st Century: a role for the Royal Entomological Society in partnership with the Biological Records Centre and the National Biodiversity Network.. Antenna,, , 32, 149-151 |
| Roy Helen E., Brown Peter M. J., Ware Remy L., Michie Laura J., Beckmann B, Majerus Michael E. N. (2008) The harlequin ladybird marches on. British Wildlife, , 19, 182-186 |
| Holroyd O., Brown Peter M. J., Roy Helen E., Majerus Michael E. N. (2008) The harlequin ladybird, Harmonia axyridis, reaches Scotland. Entomologists’ Record and Journal of Variation, , 120, 42-43 |
| Brown Peter M. J., Roy Helen E., Rothery Peter, Roy D. B., Ware Remy L., Majerus Michael E. N. (2007) Harmonia axyridis in Great Britain: analysis of the spread and distribution of a non-native coccinellid. BioControl, , 53, 55-67 |
