Klinkhammer

Cauchy problem in spacetimes with closed timelike curves.

Friedman, Thorne, Morris, 1990, Physical review. D, Particles and fields.

Vacuum polarization of scalar and spinor fields near closed null geodesics.

Klinkhammer, 1992, Physical review. D, Particles and fields.

Billiard balls in wormhole spacetimes with closed timelike curves: Classical theory.

Thorne, Echeverría, Klinkhammer, 1991, Physical review. D, Particles and fields.

Averaged energy conditions for free scalar fields in flat spacetime.

Klinkhammer, G. Klinkhammer, 1991, Physical review. D, Particles and fields.