Releasing grey squirrels into the wild. (23rd March 2019) - Shuttleworth, C. M.; Bertolino, S.; Gill, R.; Gurnell, J.; Hayward, M. W.; Kenward, R. E.; Lawton, C.; Lurz, P. W. W.; McInnes, C. J.; Mill, A.; Trotter, S.; Wauters, L. A.