@article{SLC_2011-2012_66_a4,
     author = {Viviane Pons},
     title = {Multivariate {Polynomials} in {Sage}},
     journal = {S\'eminaire lotharingien de combinatoire},
     year = {2011-2012},
     volume = {66},
     url = {http://geodesic.mathdoc.fr/item/SLC_2011-2012_66_a4/}
}