, Volume 44, Issue 6, pp 1581-1586,
Open Access This content is freely available online to anyone, anywhere at any time.
Date: 31 Mar 2012

Editorial note to: J. Ehlers, F. A. E. Pirani and A. Schild, The geometry of free fall and light propagation

The republication of the original paper can be found in this issue following the editorial note and online via doi:10.1007/s10714-012-1353-4.