text: * IMRET 1,  Frankfurt, Germany, February 1997
  * IMRET 2,  New Orleans, United States, March 1998
  * IMRET 3, Frankfurt, Germany, April 1999
  * IMRET 4, Atlanta, United States, March 2000
  * IMRET 5,  Strasbourg, France, May 2001
  * IMRET 6, New Orleans, United States, March 2002
  * IMRET 7,  Lausanne, Switzerland, September 2003
  * IMRET 8,  Atlanta, United States, April 2005
  * IMRET 9, Potsdam, Germany, September 2006
  * IMRET 10,  New Orleans, United States, April 2008
  * IMRET 11,  Kyoto, Japan, March 2010
  * IMRET 12,  Lyon, France, February 2012
  * IMRET 13,  Budapest, Hungary, June 2014
  * IMRET 14,  Beijing, China, September 2016
  * IMRET 15,  Karlsruhe, Germany, October 2018