@article{JIS_2006__9_4_a5,
     author = {Sofo,  Anthony},
     title = {General properties involving reciprocals of binomial coefficients},
     journal = {Journal of integer sequences},
     year = {2006},
     volume = {9},
     number = {4},
     zbl = {1108.11021},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/JIS_2006__9_4_a5/}
}