@article{10_37236_3490,
     author = {Simone Rinaldi and Samanta Socci},
     title = {About half permutations},
     journal = {The electronic journal of combinatorics},
     year = {2014},
     volume = {21},
     number = {1},
     doi = {10.37236/3490},
     zbl = {1300.05018},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/3490/}
}