@article{Batanin_2012,
title={Centers and homotopy centers in enriched monoidal categories},
volume={230},
ISSN={0001-8708},
url={http://dx.doi.org/10.1016/j.aim.2012.04.011},
DOI={10.1016/j.aim.2012.04.011},
number={4–6},
journal={Advances in Mathematics},
publisher={Elsevier BV},
author={Batanin,
Michael and Markl,
Martin},
year={2012},
month=jul,
pages={1811–1858} }