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The lecture "Robinson manifolds, Cauchy-Riemann spaces and the
shear-free condition" by Andrzej Trautman was based on the following three
publications:
A. Trautman, "Robinson manifolds and Cauchy-Riemann spaces,"
Class. Quantum Grav., 19 R1–R10 (2002),
P. Nurowski and A. Trautman, "Robinson manifolds as the Lorentzian
analogs of Hermite manifolds," Diff. Geom. Appl., 17, 175–195
(2002),
A. Trautman, "Robinson manifolds and the shear-free condition," Int. J.
Modern Phys. A, 17 (no. 20), 2735–37 (2002).
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