@article{JIS_2010__13_5_a5,
     author = {Kamano,  Ken},
     title = {Sums of products of {Bernoulli} numbers, including {poly-Bernoulli} numbers},
     journal = {Journal of integer sequences},
     year = {2010},
     volume = {13},
     number = {5},
     zbl = {1238.11021},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/JIS_2010__13_5_a5/}
}