Authors: Sandi R Copeland; Matt Sponheimer; Darryl J de Ruiter; Julia A Lee-Thorp; Daryl Codron; Petrus J le Roux; Vaughan Grimes; Michael P Richards Journal: Nature Date: 2011-06-02 Impact factor: 49.962
Authors: Thure E Cerling; Emma Mbua; Francis M Kirera; Fredrick Kyalo Manthi; Frederick E Grine; Meave G Leakey; Matt Sponheimer; Kevin T Uno Journal: Proc Natl Acad Sci U S A Date: 2011-05-02 Impact factor: 11.205