Some links to media coverage of the Trial World Championship, USGP:
- Chattanooga Times Free Press (video): Motorcycle trials world championships in Sequatchie Valley
- Cycle News: Adam Raga Sweeps U.S. World Trials In Tennessee
- Dirt Rider: World Trials round in Tennessee
- FIM (2 articles): Raga rules in USA; King Bernie is back in town;
- Trials Central (2 articles): 2013 Trial World Championship Round 2, Day 1; Day 2
- Trials and Enduro News (2 articles, 1 photo gallery): Adam Raga Wins Day One In Tennessee; Raga Sweeps US World Trials In Tennessee; US World Trials Photo Gallery