boxjockey...
The maximum takeoff thrust limit is 5/10 minutes, using anything at or less than MCT (as it is the first setting at or below which a time limit does not exist) you are not limited/required to stay at that setting for 5/10 minutes.
The "paper" you're looking for is the definition of the term. "Maximum takeoff thrust" does not necessarily equal "reduced takeoff thrust", "assumed temperature" and so on, unless you have chosen a non-derated/non-reduced takeoff.