General Information:
EU-Community: https://www.daad.de/de/laenderinformationen/
EURES-Portal: https://ec.europa.eu/eures/main.jsp?acro=lw&lang=de&catId=490&parentId=0
Visa:
Visa types and requirements: https://www.mfa.gov.rs/en/citizens/travel-serbia/visa-requirements
Working in Serbia:
Work permits: https://www.euraxess.rs/serbia/information-assistance
Tax regulations:
EURAXESS Serbia: https://www.euraxess.rs/serbia/information-assistance/taxation
https://www.rsm.global/serbia/sites/default/files/media/dokumenta/serbia_tax_highlights_2019.pdf
Country and cultural information:
DAAD: https://www.daad.de/de/laenderinformationen/europa/serbien/
Wikipedia: https://en.wikipedia.org/wiki/Serbia
Accommodation:
Visit Serbia: https://www.serbia.travel/en
Euroaxess Serbia: https://www.euraxess.rs/serbia/information-assistance/accommodation
Srbija Nekretnine: https://www.srbija-nekretnine.org/
Further information:
Tourist information: https://www.serbia.com/
Lonelyplanet: https://www.lonelyplanet.com/serbia