@workingPaper{MüllerMüllerPischelScheidhauer_1992,
title={On the representation of temporal knowledge},
author={Müller, Jürgen and Müller, Jörg P. and Pischel, Markus and Scheidhauer, Ralf},
doi={http://dx.doi.org/10.22028/D291-25036},
year={1992}
}