@article{SLC_2005-2007_55_a0,
     author = {Alois Panholzer and Helmut Prodinger},
     title = {Computer-free {Evaluation} of an {Infinite} {Double} {Sum} via {Euler} {Sums}},
     journal = {S\'eminaire lotharingien de combinatoire},
     publisher = {mathdoc},
     volume = {55},
     year = {2005-2007},
     url = {http://geodesic.mathdoc.fr/item/SLC_2005-2007_55_a0/}
}