Authors: Glen M Macdonald; David W Beilman; Konstantine V Kremenetski; Yongwei Sheng; Laurence C Smith; Andrei A Velichko Journal: Science Date: 2006-10-13 Impact factor: 47.728
Authors: Hinrich Schaefer; Michael J Whiticar; Edward J Brook; Vasilii V Petrenko; Dominic F Ferretti; Jeffrey P Severinghaus Journal: Science Date: 2006-08-25 Impact factor: 47.728