In September 1973, I moved to Budapest (Hungary) where I first learned Hungarian language, and then studied mathematics at Eötvös Loránd University Budapest (ELTE). After an intermediate stay in East-Germany and the wedding with Zsuzsanna Markó in 1979, I returned to Budapest in 1980, where I became a member of Tibor Braun’s staff at the Library of the Hungarian Academy of Sciences.

In 1990, I started a nomadic life. Between 1990 and 1997, I spent three years at several German research institutions in Konstanz, Bielefeld, Berlin and Frankfurt (Oder).
In 1998 my wife and I finally settled in Perbál (Hungary). However, four years later we moved to Leuven (Belgium) where I became a staff member of the Steunpunt O&O Statistieken (since 2007 Steunpunt O&O Indicatoren).

The above picture, taken by my wife in spring 2003, shows me in our former home in the Old Slaughterhouse of Leuven that has been completely rebuilt into a modern apartment house in 1995. In 2006 we moved to Heverlee, a suburb of Leuven; our new home is located close to the Heverlee wood.

Professional links

I am employee of the Steunpunt O&O Indicatoren in Leuven and of the Institute for Research Organisation in Budapest. For more detailed information about these institutes visit their official websites. For two years, in 1990/1991 and 1995/1996, I was a fellow of the Alexander von Humboldt Foundation.
At present, I am also Secretary-Treasurer of the International Society for Scientometrics and Informetrics (ISSI), editor-in-chief of the ISSI e-Newsletter, co-editor of the journal Scientometrics and member of the editorial board of the Journal of Informetrics.