%0 Journal Article %A Christian Wuthrich %T On the integrality of modular symbols and Kato's Euler system for elliptic curves %J Documenta mathematica %D 2014 %P 381-402 %V 19 %U http://geodesic.mathdoc.fr/articles/10.4171/dm/450/ %R 10.4171/dm/450 %F 10_4171_dm_450