Citation Hunt

The Wikipedia snippet below is not backed by a reliable source. Can you find one?

Click I got this! to go to Wikipedia and fix the snippet, or Next! to see another one. Good luck!

In page Renzo Pasolini:

"

Much debate has surrounded the probable causes of the accident, with the most common explanation suggesting that a spill left on the track during the 350cc race (when Walter Villa's Benelli leaked on the penultimate lap, but the urge to collect championship points led the rider to continue racing despite the leak) likely caused the bike to slide. While it has been ascertained that race officials did neglect to order clean up of the track prior to the 250cc race—one rider, John Dodds, made his concerns known to authorities, only to be met with threats—Pasolini's fall and the damage sustained by his vehicle are consistent with an engine problem, likely a seizure of the pistons.[6]