For a start in the BT Sport coverage of the match. Both Neil Warnock and Steve McManaman, who had earlier claimed that Young should have been sent off for the earlier dive, acknowledged that it was a foul. Former refereee Mark Halsey, working for BT Sport insisted it was a foul.
http://www.bbc.co.uk/sport/0/football/23999569 "Kagisho Dikgacoi was adjudged to have fouled Ashley Young. Dikgacoi was red-carded, with Palace unhappy at the decision and arguing the offence took place outside the area." - If it wasn't a foul what would Dikacoi's offence be and why would Palace complain that it happened outside the box?
http://www.telegraph.co.uk/sport/fo.../Manchester-United-v-Crystal-Palace-live.html "there's no doubt Dikgacoi brought Young down from behind"
http://www.espn.co.uk/football/sport/story/238055.html "Kagisho Dikgacoi was red-carded for denying Ashley Young a clear goal-scoring opportunity"
http://www.dailystar.co.uk/sport/fo...l-Palace-0-Wayne-Rooney-is-back-in-the-groove "Jon Moss gave United a penalty and sent off Kagisho Dikgacoi for bringing down Ashley Young"
http://www.express.co.uk/sport/foot...al-Palace-0-Wayne-Rooney-too-smart-for-Palace "Dikgacoi caught the former Aston Villa player"
http://www.bbc.co.uk/sport/0/football/24105809 "Dikgacoi, who was later sent off by referee Jon Moss for a foul on Young"
http://www.theguardian.com/football/2013/sep/14/manchester-united-crystal-palace-premier-league "Young was also involved when Moss did point to the penalty spot and, this time, he probably deserves the benefit of the doubt."
http://www.mirror.co.uk/sport/football/match-reports/manchester-united-2-0-crystal-palace-2204757 "dismissed for bringing down Ashley Young"
http://www.aljazeera.com/sport/football/2013/09/2013914192750550596.html "Kagisho Dikgacoi was sent off for fouling Ashley Young"
http://www.theguardian.com/football/2013/sep/15/marouane-fellaini-wayne-rooney-manchester-united "he was fouled by Kagisho Dikgacoi and pointed to the spot. While
the contact "looked to have begun outside the area"
http://www.telegraph.co.uk/sport/fo...r-United-2-Crystal-Palace-0-match-report.html "some doubt over whether
the offence had taken place inside the penalty box."
Reuters: "Manchester United's Ashley Young is fouled by Crystal Palace's Kagisho Dikgacoi"
Plenty of links there, so hardly "near impossible", while of the three links you provided, the Times article is behind a paywall, the Daily Mail article actually refers to the earlier incident, and the Daily Star article confirms that contact was made with Young.