I don't know of any specifically for sngs (although they may exist somewhere).
Instead, I'd look for poker content regarding how to play Final Tables. This will be more popular and the strategy is identical for a sng as one table is one table - regardless if it started as one or as hundreds of tables (huge MTT).
The main concepts to look for are probably payout implications, effective stacks and your willingness to bust versus laddering up a spot or two.
Best of luck and let me know if you find any useful sources of sng information