Hermann W Pfefferkorn1. 1. Department of Earth and Environmental Science, University of Pennsylvania, Philadelphia, PA 19104-6316, USA. hpfeffer@sas.upenn.edu
Authors: Henk Visscher; Cindy V Looy; Margaret E Collinson; Henk Brinkhuis; Johanna H A van Konijnenburg-van Cittert; Wolfram M Kürschner; Mark A Sephton Journal: Proc Natl Acad Sci U S A Date: 2004-07-28 Impact factor: 11.205
Authors: Jonathan L Payne; Daniel J Lehrmann; Jiayong Wei; Michael J Orchard; Daniel P Schrag; Andrew H Knoll Journal: Science Date: 2004-07-23 Impact factor: 47.728