| Yerevan, Armenia | ||
| Rio Claro, Rio Claro - SP, Brazil | ||
| Düzce, Düzce Merkez/Düzce, Turkey | ||
| Sari, Mazandaran, Iran | ||
| Cerdanyola, Barcelona, Spain | ||
| Western Australia, Australia | ||
| Perth WA, Australia | ||
| was Australia | Sweden | |
| Bonn, Germany | ||
| Porto Alegre, Porto Alegre - RS, Brazil | ||
| Canberra ACT 2601, Australia | ||
| Grottaferrata RM, Italy | ||
| Bonn, Germany | ||
| Bergen, Norway | ||
| Koblenz, Germany | ||
| Tartu, Estonia | ||
| Ul. Ravnice X 0, 10000, Zagreb, Croatia | ||
| Trento, Italy | ||
| Chapel Hill, NC, USA | ||
| Malmö, Sweden | ||
| Bremen, Germany | ||
| Rio Claro, Rio Claro - SP, Brazil | ||
| Vienna, Austria | ||
| Laramie, WY, USA | ||
| Göttingen, Germany | ||
| Bayreuth, Germany | ||
| Windhoek, Namibia | ||
| Zürich, Switzerland | ||
| Belo Horizonte, Belo Horizonte - State of Minas Gerais, Brazil | ||
| Erlangen, Germany | ||
| Wrocław, Poland | ||
| Berlin, Germany | ||
| Hungary | ||
| Brno, Czech Republic | ||
| Porto, Portugal | ||
| 53100 Siena, Province of Siena, Italy | ||
| Turku, Finland | ||
| Wrocław, Poland | ||
| Hamburg, Germany | ||
| České Budějovice, Czech Republic |
