Livingston manager accuses ref of negligence
Robertson claimed his side were denied an early penalty when Hoops goalkeeper Artur Boruc flattened ex-Shelbourne star Wes Hoolahan and questioned Stephen McManus' challenge on midfielder Allan Walker which only earned the Celtic defender a yellow card.
The visitors survived those two incidents in a tetchy first half then scored twice after the interval through Maciej Zurawski and Shaun Maloney, the second from the spot to put them 17 points ahead of Hearts and within 90 minutes of the title.