Three static models with two interacting phantom and ghost scalar fields were considered: a model of a traversable wormhole, a brane-like model and a spherically symmetric problem. It was shown numerically that regular solutions exist for all three cases.
Cite
@article{arxiv.0711.2840,
title = {4D static solutions with interacting phantom fields},
author = {Vladimir Dzhunushaliev and Vladimir Folomeev},
journal= {arXiv preprint arXiv:0711.2840},
year = {2009}
}