Miklós Bóna. A Combinatorial Proof of the Log-Concavity of a Famous Sequence Counting Permutations. Electr. J. Comb., 11(2), 2005. [doi]
@article{Bona05-0, title = {A Combinatorial Proof of the Log-Concavity of a Famous Sequence Counting Permutations}, author = {Miklós Bóna}, year = {2005}, url = {http://www.combinatorics.org/Volume_11/Abstracts/v11i2n2.html}, researchr = {https://researchr.org/publication/Bona05-0}, cites = {0}, citedby = {0}, journal = {Electr. J. Comb.}, volume = {11}, number = {2}, }