@article{05191460,
title = {The associative operad and the weak order on the symmetric groups.},
journal = {Journal of Homotopy and Related Structures},
volume = {2},
year = {2007},
pages = {57-84},
zbl = {1184.18007},
language = {en},
url = {http://dml.mathdoc.fr/item/05191460}
}
Aguiar, Marcelo; Livernet, Muriel. The associative operad and the weak order on the symmetric groups.. Journal of Homotopy and Related Structures, Tome 2 (2007) pp. 57-84. http://gdmltest.u-ga.fr/item/05191460/