Proceedings-7th International Conference on Renewable Electrical Power Sources, October 17-18. 2019, Belgrade / Zbornik Međunarodne konferencije o obnovljivim izvorima električne energije – MKOIEE
PHOTONICA2017 : 6th International School and Conference on Photonics and COST actions: MP1406 and MP1402 : program and the book of abstracts; August 23-September 1, 2017; Belgrade