ISI Web of Knowledge Citations
Citations are analysed in the commercial ISI web of knowledge data base.
Since my name isn't at all unique you have to restrict the query in the advanced search section (web of science, advanced search) by the term:
wagner A AND ((junghans or schwengner or (tsang and lynch) or senger or navin or anwand or (fiedler and crespo and enghardt) or (schramm and jochmann and irman)))
Alternatively, you may check my ResearcherID.