The EU Butterfly Indicator for Grassland species: 1990-2017: Technical Report
C.A.M. Van Swaay, E.B. Dennis, R. Schmucki, C. Sevilleja, M. Balalaikins, M. Botham, N. Bourn, T. Brereton, J.P. Cancela, B. Carlisle, P. Chambers, S. Collins, C. Dopagne, R. Escobés, R. Feldmann, J. M. Fernández-García, B. Fontaine, A. Gracianteparaluceta, C. Harrower, A. Harpke, J. Heliölä, B. Komac, E. Kühn, A. Lang, D. Maes, X. Mestdagh, I. Middlebrook, Y. Monasterio, M.L. Munguira, T.E. Murray, M. Musche, E. Õunap, F. Paramo, L. Pettersson, J. Piqueray, J. Settele, C. Stefanescu, G. Švitra, A. Tiitsaar, R. Verovnik, M.S. Warren, I. Wynhoff, D.B. Roy
Butterfly Conservation Europe & ABLE/eBMS, 23 p., 2019