@article{JIS_2016__19_2_a4,
     author = {Drube, Paul and Pongtanapaisan, Puttipong},
     title = {Annular non-crossing matchings},
     journal = {Journal of integer sequences},
     publisher = {mathdoc},
     volume = {19},
     number = {2},
     year = {2016},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/JIS_2016__19_2_a4/}
}