Please check if you need visa at http://www.mfa.gov.rs/en/consular-affairs/entry-serbia/visa-regime. In case you do need it, inform the local organisers and they will prepare an invitation letter for you.
Please check which documents you need for traveling to Serbia - passport is the safe option as Serbia is not an EU member.
Coming to Belgrade
The best way to come to Belgrade is by plain. Direct flights exist from major European airports:
London Heathrow: AirSerbia
Amsterdam Schiphol: AirSerbia
From CERN we recommend to book one of the StarAliance flights.
From Nikola Tesla Airport to the city you can take taxi or public transport.
For all information regarding taxi, please contact the city service TAXI INFO, located in the baggage claim area and please do not forget to take the receipt at the airport Info Desk specifying the desired destination and the price for taxi service. Taxi should not cost more than 2000 RSD to the city centre. It is better to have cash with you.
You can also use public transport, it is cheaper, but less convenient. For public transport around Belgrade the best option is to take BusPlus card (250 RSD + credit for rides). The price for 90-minute ticket (which you have to validate when you enter the bus/tram/troleybus) is 89 RSD. Public bus number 72 will take you to the centre. You can get out at the bus stop Zeleni Venac which is 10 minutes walk from the venue. There is also airport bus A1 that goes to the Savski Square and Slavija, ticket costs 300 RSD (cash only in the bus).
If you plan to use the public transportation often, you can buy a 1-day ticket (280 RSD), a 3-day ticket (720RSD) or a 5-day ticket(1100RSD) using your BusPlus card. These types of tickets are different from the 90-minutes ticket - the time limit for these tickets start when you buy them, not when you validate your ticket when you enter the bus. When you buy this type of ticket, you will get a reciept which will tell you when exactly does your ticket expire. These tickets also have to be validated when you enter the bus.
There are quite some number of restaurants 15-20 minutes walking distance from the venue. Some of our suggestions:
KMN, Zmaj Jovina 11
Supe i Salate (Soups and salads), Brace Jugovica 3
Burger House, Nikole Spasica 3, http://www.burgerhouse.rs/menu
Kolarac, Knez Mihailova 46,
Trattoria Campania, Kneza Sime Markovica 10, http://trattoriacampania.com/?lang=en
Via Del Gusto, Knez Mihailova 48, http://viadelgusto.rs
Snezana, Knez Mihailova 50, http://www.snezana.rs/home/
Radost Fina Kuhinjica, Pariska 3
Mayka, Nikole Spasica 5, https://maykabeograd.wixsite.com/maykabeograd
Roaming charges apply in Serbia, we suggest to switch off data transfer on you mobile before you enter.
Don't hesitate to contact local organizers in case you have questions!