@article{10_37236_1889,
     author = {Mikl\'os B\'ona},
     title = {A combinatorial proof of the log-concavity of a famous sequence counting permutations},
     journal = {The electronic journal of combinatorics},
     year = {2004},
     volume = {11},
     number = {2},
     doi = {10.37236/1889},
     zbl = {1067.05002},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/1889/}
}