@article{02028928,
title = {Symmetric monoidal completions and the exponential principle among labeled combinatorial structures.},
journal = {Theory and Applications of Categories [electronic only]},
volume = {11},
year = {2003},
pages = {397-419},
zbl = {1076.18006},
language = {en},
url = {http://dml.mathdoc.fr/item/02028928}
}
Menni, Matías. Symmetric monoidal completions and the exponential principle among labeled combinatorial structures.. Theory and Applications of Categories [electronic only], Tome 11 (2003) pp. 397-419. http://gdmltest.u-ga.fr/item/02028928/