Authors: Parmesan, C Ryrholm, N Stefanescu, C Hill, JK Thomas, CD Descimon, H Huntley, B Kaila, L Kullberg, J Tammaru, T Tennent, WJ Thomas, JA Warren, M

Citation: C. Parmesan et al., Poleward shifts in geographical ranges of butterfly species associated with regional warming, NATURE, 399(6736), 1999, pp. 579-583