How could you accelerate the mouth of a wormhole? Reference request.

Question

This paper discusses what you can do by accelerating one of the mouths of a wormhole:

• Michael S. Morris, Kip S. Thorne, and Ulvi Yurtsever, Wormholes, time machines, and the weak energy condition, Physical Review Letters 61 13 (1988), 1446.

It triggered a long discussion.   However, unless I missed it, this particular paper doesn't talk about how you can accelerate one of the mouths of a wormhole.  Are there some papers that discuss that? 

The obvious guess would be that a wormhole mouth acts like a massive object and you can accelerate it using gravity.   However, I'd like to see a paper that does some calculations on this issue.