664 citations · 3.3k across the 54 of their papers we have counts for
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gr-qc2003★ 268 cited
On the exact gravitational lens equation in spherically symmetric and static spacetimes
Volker Perlick
Lensing in a spherically symmetric and static spacetime is considered, based on the lightlike geodesic equation without approximations. After fixing two radius values r_O and r_S,…
gr-qc2003★ 23 cited
Inertial forces and photon surfaces in arbitrary spacetimes
Thomas Foertsch, Wolfgang Hasse, Volker Perlick
Given, in an arbitrary spacetime, a 2-dimensional timelike submanifold (worldsheet) and an observer field on this worldsheet, we assign gravitational, centrifugal, Coriolis and Eul…