European summer temperatures since Roman times oleh J Luterbacher, J P Werner, J E Smerdon, L Fernández-Donado, F J González-Rouco, D Barriopedro, F C Ljungqvist, U Büntgen, E Zorita, S Wagner, J Esper, D McCarroll, A Toreti, D Frank, J H Jungclaus, M Barriendos, C Bertolin, O Bothe, R Brázdil, D Camuffo, P Dobrovolný, M Gagen, E García-Bustamante, Q Ge, J J Gómez-Navarro, J Guiot, Z Hao, G C Hegerl, K Holmgren, V V Klimenko, J Martín-Chivelet, C Pfister, N Roberts, A Schindler, A Schurer, O Solomina, L von Gunten, E Wahl, H Wanner, O Wetter, E Xoplaki, N Yuan, D Zanchettin, H Zhang, C Zerefos