@conferenceObjectPart{WeberSteinbachBottaDeubel_2004,
title={Modelling of product-service systems (PSS) based on the PDD approach},
author={Weber, Christian and Steinbach, Michael and Botta, Christian and Deubel, Till},
isbn={953-6313-59-6},
doi={http://dx.doi.org/10.22028/D291-22473},
year={2004}
}