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Smooth and discontinuous signature type change in general relativityM. Kossowski; M. Kriele · 1993
The Einstein Equation for Signature Type Changing SpacetimesKossowski, M.; Kriele, M. · Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences · 1994
Transverse, Type Changing, Pseudo Riemannian Metrics and the Extendability of GeodesicsKossowski, M.; Kriele, M. · Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences · 1994