@article{SLC_2009-2011_61A_a3,
     author = {Alan D. Sokal},
     title = {A {Ridiculously} {Simple} and {Explicit} {Implicit} {Function} {Theorem}},
     journal = {S\'eminaire lotharingien de combinatoire},
     publisher = {mathdoc},
     volume = {61A},
     year = {2009-2011},
     url = {http://geodesic.mathdoc.fr/item/SLC_2009-2011_61A_a3/}
}