Before revision: Centres Austria Viktor Obendrauf China Zhou Ning-Huai Egypt Mahmoud K. El-Marsafy Germany Angela Koehler-Kruetzfeld,Peter Schwarz,Waltraud Habelitz , Michael Tausch, John McCaskill Hong Kong Winghong Chan Israel Mordechai Livneh Japan Kazuko Ogino Macedonia Metodija Najdoski Mexico Jorge Ibanez, Arturo Fregoso, Carmen Doria, Rosa Maria Mainero, Margarita Hernandez, et al.
After revision: Centres Austria Viktor Obendrauf China Zhou Ning-Huai Egypt Mahmoud K. El-Marsafy Germany Angela Koehler-Kruetzfeld,Peter Schwarz,Waltraud Habelitz-Tkotz, "Theodor Grofe", "Bernd-Heinrich Brand", , Michael Tausch, John McCaskill Hong Kong Winghong Chan Israel Mordechai Livneh Japan Kazuko Ogino Macedonia Metodija Najdoski Mexico Jorge Ibanez, Arturo Fregoso, Carmen Doria, Rosa Maria Mainero, Margarita Hernandez, et al.