Distance sampling and the challenge of monitoring butterfly populations (pages 585–594)Nick J. B. Isaac, Katie L. Cruickshanks, Ann M. Weddle, J. Marcus Rowcliffe, Tom M. Brereton, Roger L. H. Dennis, David M. Shuker and Chris D. Thomas
Article first published online: 28 MAR 2011 | DOI: 10.1111/j.2041-210X.2011.00109.x