@article{Author1-A,
    author = {Author1},
    title = {A},
    journaltitle = {Journaltitle1},
    year = {2017}
}
@article{Author1-B,
    author = {Author1},
    title = {B},
    journaltitle = {Journaltitle2},
    year = {2016}
}
@article{Author2-C,
    author = {Author2},
    title = {C},
    journaltitle = {Journaltitle3},
    year = {2015}
}