Board Thread:Wiki-Related Questions and Answers/@comment-1916997-20130510211800/@comment-4839682-20130510220430

First, they are referencing the "Price and the Pauper" and "Peter and the Wolf" -- both stories have been done on the show. I'm sure I can find some writer/creator confirmation on both of those.

As for TLM and TWoO, it's too soon. Yes, they've been alluded to, but they haven't been more directly referenced. When they're done on the show, or characters are mentioned by name, then it's time :D