%0 Journal Article %A Kejian Xu %A Zhaopeng Dai %A Zongduo Dai %T The formulas for the coefficients of the sum and product of $p $-adic integers with applications to Witt vectors %J Acta Arithmetica %D 2011 %P 361-384 %V 150 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/aa150-4-3/ %R 10.4064/aa150-4-3 %G en %F 10_4064_aa150_4_3