@article{10_4153_CJM_1968_059_6,
     author = {Ewell, John A.},
     title = {On {The} {Determination} of {Sets} by {Sets} of {Sums} of {Fixed} {Order}},
     journal = {Canadian journal of mathematics},
     pages = {596--611},
     year = {1968},
     volume = {20},
     number = {1},
     doi = {10.4153/CJM-1968-059-6},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1968-059-6/}
}