@article{testkey,
year = {2008},
title = "foo",
author = {A. Bar and L.M. M\"uller},
journal = {journal},
volume = {1},
number = {1},
pages = {1},
}
@article{testkey,
year = {2008},
title = "foo",
author = {A. Bar and L.M. M\"uller},
journal = {journal},
volume = {1},
number = {1},
pages = {1},
}