@article{10_37236_2009,
     author = {Gaurav Bhatnagar},
     title = {In praise of an elementary identity of {Euler}},
     journal = {The electronic journal of combinatorics},
     year = {2011},
     volume = {18},
     number = {2},
     doi = {10.37236/2009},
     zbl = {1230.33010},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/2009/}
}