- commons.wikimedia.org wiki/Category:Simon_Sluga
- football-fun-live.com player/simon-sluga/career
- ru.uefa.com uefaeuropaconferenceleague/clubs/…
- sportlive.bg tags/90747
- fifaindex.com ru/player/206065/simon-sluga/fifa20/
- worldfootball.net player_summary/simon-sluga/Simon Sluga, Plays forPFC Ludogorets Razgrad, Luton Town, HNK Rijeka, Spezia Calcio, Lokomotiva Zagreb, NK Pomorac, Hellas Verona, Juventus.
- topsport.bg about/simon-sluga
- uzfifa.net players/view/80-simon-sluga.html
- futboltv.asia players/view/80-simon-sluga.html
- tengrisport.kz europa-league/player/47666/