@article{10_37236_1336,
     author = {Marko Petkov\v{s}ek and Herbert S. Wilf},
     title = {When can the sum of \((1/p)\)th of the binomial coefficients have closed form},
     journal = {The electronic journal of combinatorics},
     year = {1997},
     volume = {4},
     number = {2},
     doi = {10.37236/1336},
     zbl = {0884.05003},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/1336/}
}