@article{BMMS_2008_31_2_a6,
     author = {C. H. Pah},
     title = {An {Application} of {Catalan} {Numbers} on {Cayley} {Tree} of {Order} 2: {Single} {Polygon} {Counting}},
     journal = {Bulletin of the Malaysian Mathematical Society},
     year = {2008},
     volume = {31},
     number = {2},
     url = {http://geodesic.mathdoc.fr/item/BMMS_2008_31_2_a6/}
}