Of the 10 interacting pairs of dwarf galaxies in this study, 7 appear to have dense bridges of gas connecting them. The density of the gas content in these bridges is higher than the gas content in the surrounding regions. This explains why star formation can occur in these regions but not elsewhere. Ultimately, it is the proximity with massive host galaxies that drives the lost of gas content from interacting pairs of dwarf galaxies, and not due to mutual interactions between the dwarf galaxies themselves.
"Local Volume TiNy Titans: Gaseous Dwarf-Dwarf Interactions in the Local Universe", arXiv:1603.09342 [astro-ph.GA]