2023: Anthony Hand, Armadale, Victoria, Australia
2022: Elisa M.T. Melloni, Milano, Italy
2017: Tom Woelders, Groningen, The Netherlands
2016: K. Boddum, Copenhagen, Denmark
2015: V. Gabel, Basel, Switzerland
2010: D. Delmonte, Milan, Italy
2009: L. Nowak, Detroit, USA
2007: K. Jankowski, Warsaw, Poland
2006: M-P. Lavoie, Quebec, Canada
2004: K.J. Rohan, Bethesda, USA
2002 K.M. Koorengevel, Groningen, The Netherlands
2001: E. Michalak, Wrexham, UK
2000: K.M. Sharkey, Chicago, USA
1999: M. Hébert, Chicago, USA
1997: B.B. Pinchasov, Novosibirsk, Russia