@inbook{Bruderer_2016,
title={The World’s Smallest Mechanical Parallel Calculator: Discovery of Original Drawings and Patent Documents from the 1950s in Switzerland},
ISBN={9783319494630},
ISSN={1868-422X},
url={http://dx.doi.org/10.1007/978-3-319-49463-0_13},
DOI={10.1007/978-3-319-49463-0_13},
booktitle={International Communities of Invention and Innovation},
publisher={Springer International Publishing},
author={Bruderer,
Herbert},
year={2016},
pages={186–192} }