@article{SLC_1996_38_a2,
     author = {Helmut Prodinger},
     title = {A {Note} on the {Distribution} of the {Three} {Types} of {Nodes} in {Uniform} {Binary} {Trees}},
     journal = {S\'eminaire lotharingien de combinatoire},
     year = {1996},
     volume = {38},
     url = {http://geodesic.mathdoc.fr/item/SLC_1996_38_a2/}
}