@article{10_4153_CJM_1971_058_5,
     author = {Sehgal, Sudarshan K.},
     title = {On {Class} {Sums} in {p-Adic} {Group} {Rings}},
     journal = {Canadian journal of mathematics},
     pages = {541--543},
     year = {1971},
     volume = {23},
     number = {3},
     doi = {10.4153/CJM-1971-058-5},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1971-058-5/}
}