Authors: Michael E Mann; Zhihua Zhang; Scott Rutherford; Raymond S Bradley; Malcolm K Hughes; Drew Shindell; Caspar Ammann; Greg Faluvegi; Fenbiao Ni Journal: Science Date: 2009-11-27 Impact factor: 47.728
Authors: Fredrik Charpentier Ljungqvist; Paul J Krusic; Hanna S Sundqvist; Eduardo Zorita; Gudrun Brattström; David Frank Journal: Nature Date: 2016-04-07 Impact factor: 49.962