@article{JIS_2008__11_2_a1,
     author = {Spivey,  Michael Z.},
     title = {A generalized recurrence for {Bell} numbers},
     journal = {Journal of integer sequences},
     year = {2008},
     volume = {11},
     number = {2},
     zbl = {1231.11026},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/JIS_2008__11_2_a1/}
}