@book{aa,
      author = {Aachen, Georgina},
      title = {Title AA},
    }
    @book{vn,
      author = {Vn, A},
      title = {Title VN},
    }
    @book{vr,
      author = {Vr, A},
      title = {Title VR},
    }
    @book{wolf,
      author={Wolf, Ceasar},
      title={Title B},
    }
    @book{ringa,
      author = {Ånten, Georgina},
      title = {Title Å},
    }
    @book{ua,
      author = {Änten, Georgina},
      title = {Title Ä},
    }
    @book{uo,
      author = {Önten, Georgina},
      title = {Title Ö},
    }