@article{10_4153_CMB_1967_015_8,
     author = {Abbott, H. L. and Gardner, B.},
     title = {An {Extremal} {Problem} in {Number} {Theory}},
     journal = {Canadian mathematical bulletin},
     pages = {173--177},
     year = {1967},
     volume = {10},
     number = {2},
     doi = {10.4153/CMB-1967-015-8},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1967-015-8/}
}