@article{10_1017_S2040618500034626,
     author = {Diananda, P. H.},
     title = {On a cyclic sum},
     journal = {Glasgow mathematical journal},
     pages = {11--13},
     year = {1963},
     volume = {6},
     number = {1},
     doi = {10.1017/S2040618500034626},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S2040618500034626/}
}