@article{10_4153_CJM_1970_098_5,
     author = {Ruckle, William H.},
     title = {An {Abstract} {Concept} of the {Sum} of a {Numerical} {Series}},
     journal = {Canadian journal of mathematics},
     pages = {863--874},
     year = {1970},
     volume = {22},
     number = {4},
     doi = {10.4153/CJM-1970-098-5},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1970-098-5/}
}