@article{10_4171_dm_450,
     author = {Christian Wuthrich},
     title = {On the integrality of modular symbols and {Kato's} {Euler} system for elliptic curves},
     journal = {Documenta mathematica},
     pages = {381--402},
     year = {2014},
     volume = {19},
     doi = {10.4171/dm/450},
     url = {http://geodesic.mathdoc.fr/articles/10.4171/dm/450/}
}