@article {Cl2005,
    author = {Claesson, Anders},
     title = {Counting segmented permutations using bicoloured {D}yck paths},
   journal = {Electron. J. Combin.},
  fjournal = {Electronic Journal of Combinatorics},
    volume = {12},
      year = {2005},
     pages = {Research Paper 39, 18},
       url = {http://www.combinatorics.org/Volume_12/Abstracts/v12i1r39.html},
}