And this ties closely in to the movie's interpretation of Murphy's law - not that "whatever can go wrong will go wrong" but rather "what ever can happen will happen" with the logical AND physically correct interpretation being that: if something happens then the moment later it obviously has happened and the moment before it was obviosly bound to happen, and therefore even if you could bend time or even go back in time, it would still happen since it was both bound to happen, took place in that moment of time and afterwards had happened. All in Closed time loop.
There is a great examination of time travel written by Larry Niven called "The Theory and Practice of Time Travel." He also had a good companion piece called the "The Theory an Practice of Teleportation." Both are looking at the fun science fiction ideas with a hard science outlook.
The book that both are collected in is called "All the Myriad Ways."