 In April 2005 Jovan Ajduković gave three public lectures at the University of Vienna and the University of Graz, Austria.In October 2006 he gave a special lectures on Contact Linguistics and Russian Internet Resources at the Institute of Western and Southern Slavic Studies, Warsaw University, Poland.Jovan Ajduković is best known for his contribution to the so-called "Theory of Contacteme" (Ajduković 2004) and for his "A Contactological Dictionary of Slavic Languages