@workingPaper{BosEggSchiehlen_1996,
title={Definition of the abstract semantic classes for the Verbmobil Forschungsprototyp 1.0},
author={Bos, Johan and Egg, Markus and Schiehlen, Michael},
doi={http://dx.doi.org/10.22028/D291-25280},
year={1996}
}