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Traversable wormholes without exotic matter in multimetric repulsive gravity

The following articles refer to Phys. Rev. D 89 (2014) 087503 [arXiv:1312.5290 [gr-qc]]. However, it should be noted that the wormhole solution discussed in this work is unstable, its construction and maintenance are highly obstructed by repulsive gravitational forces and the fact that dark matter cannot be manipulated by other means than gravity, and that it is based on a gravity theory which still requires thorough experimental tests. The correct description of multimetric wormholes is given in the original article cited above only; the following articles contain numerous simplification mistakes and should not be taken as a reference.