@article{10_37236_3412,
     author = {Ernest X.W. Xia and Olivia X.M. Yao},
     title = {A criterion for the log-convexity of combinatorial sequences},
     journal = {The electronic journal of combinatorics},
     year = {2013},
     volume = {20},
     number = {4},
     doi = {10.37236/3412},
     zbl = {1298.05041},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/3412/}
}