Authors: Robert R Gaines; Emma U Hammarlund; Xianguang Hou; Changshi Qi; Sarah E Gabbott; Yuanlong Zhao; Jin Peng; Donald E Canfield Journal: Proc Natl Acad Sci U S A Date: 2012-03-05 Impact factor: 11.205
Authors: Benjamin C Gill; Timothy W Lyons; Seth A Young; Lee R Kump; Andrew H Knoll; Matthew R Saltzman Journal: Nature Date: 2011-01-06 Impact factor: 49.962