@article{SLC_2009-2011_61A_a12,
     author = {Peter J. Cameron and Christian Krattenthaler and Thomas W. M\"uller},
     title = {Decomposable {Functors} and the {Exponential} {Principle,} {II}},
     journal = {S\'eminaire lotharingien de combinatoire},
     year = {2009-2011},
     volume = {61A},
     url = {http://geodesic.mathdoc.fr/item/SLC_2009-2011_61A_a12/}
}