Madrid, Spain and San Pedro de Montes de Oca, Costa Rica; jmgb(at)cariari.ucr.ac.cr
Received 3 May 2002, accepted 12 May 2002 by F. W. Hehl
Experimentalphysik VI, Center for Electronic Correlations and Magnetism, Institute of Physics, Augsburg University, 86135 Augsburg, Germany; stephan.leitenmeier(at)physik.uni-augsburg.de
Received 28 January 2002, accepted 24 April 2002 by U. Eckern
Department of Physics, Yerevan State University, Manookian 1, 375025 Yerevan, Armenia, and Department of Physics, State Engineering University, Terian 3, 375046 Yerevan, Armenia; dsedrak(at)www.physdep.r.am, akhachat(at)www.physdep.r.am
Received 20 March 2002, accepted 28 March 2002 by G. Röpke
Universität Jena, Germany; meinel(at)tpi.uni-jena.de
Received 28 May 2002, accepted 1 June 2002 by F. W. Hehl
University of Szczecin, Poland; Jerzy_Stelmach(at)sus.univ.szczecin.pl
Received 19 January 2002, revised 23 June 2992, accepted
26 June 2002 by F. W. Hehl
University of Missouri-Columbia, USA; MashhoonB(at)missouri.edu
Received 24 June 2002, accepted 27 June 2002 by F. W. Hehl