Language
- English with Spanish summary5
- German with English summary5
- English with French / German summary4
- German with English / French summary4
- German with English abstract4
- Chinese with English abstract3
- Danish3
- English / Turkish3
- English with Arabic summary3
- Spanish with English abstract3
- Yugoslavic3
- English with Chinese abstract2
- English with French abstract2
- English with German / Spanish summary2
- French with English / Spanish summary2
- Japanese with English abstract2
- Norwegian2
- Portuguese with English abstract2
- Romanian2
- Afrikaans1