@article{SLC_2009-2011_61A_a1,
     author = {Bruce E. Sagan},
     title = {Probabilistic {Proofs} of {Hook} {Length} {Formulas} {Involving} {Trees}},
     journal = {S\'eminaire lotharingien de combinatoire},
     year = {2009-2011},
     volume = {61A},
     url = {http://geodesic.mathdoc.fr/item/SLC_2009-2011_61A_a1/}
}