@article{JIS_2011__14_6_a2,
     author = {Furdui,  Ovidiu and Trif,  Tiberiu},
     title = {On the summation of certain iterated series},
     journal = {Journal of integer sequences},
     year = {2011},
     volume = {14},
     number = {6},
     zbl = {1235.40004},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/JIS_2011__14_6_a2/}
}