Stadtspiegel Gardelegen Dezember 2010
Stadtspiegel-Gardelegen-November-2010
Einstein equations and conformal structure: Existence of anti-de Sitter-type space-times
On the hyperbolicity of Einstein's and other gauge field equations
Yamabe Numbers and the Brill–Cantor Criterion
On the Rigidity Theorem for Spacetimes with a Stationary Event Horizon or a Compact Cauchy Horizon