Authors

J. A. Maruhn                                                                                                            

Institut f ̈ur Theoretische Physik, Goethe-Universit ̈ at, Max-von-Laue Str. 1, 60438 Frankfurt am Main, Germany

P.-G. Reinhard

Institut f ̈ ur Theoretische Physik II, Universit ̈ at Erlangen-N ̈ urnberg,
Staudtstrasse 7, 91058 Erlangen, Germany

P. D. Stevenson

Department of Physics, University of Surrey, Guildford, Surrey, GU2 7XH, United Kingdom

A. S. Umar

Department of Physics and Astronomy, Vanderbilt University,
Nashville, Tennessee 37235, USA