1999 scientific article

scholarly article by A Heister et al published September 2002 in Physics Letters B

scholarly article by Robert Barate et al published August 2000 in Physics Letters B

scholarly article by Robert Barate et al published March 1999 in Physics Letters B

scholarly article by Robert Barate et al published August 2000 in Physics Letters B

scientific article

scholarly article by S. Schael et al published 28 November 2006 in European Physical Journal C