His research has been published in most of the international systems journals and has been presented in conference papers and in guest appearances in Australia, USA, Europe and Latin America. See also Publications J. Donald R. de RaadtArchived 2008-06-12 at the Wayback Machine. Retrieved 3 June 2008.
His research has been published in most of the international systems journals and has been presented in conference papers and in guest appearances in Australia, USA, Europe and Latin America. See also Publications J. Donald R. de RaadtArchived 2008-06-12 at the Wayback Machine. Retrieved 3 June 2008.
