@article{Collins1983,
    author = "Collins, D.M. and Mahar, M.C. and Whitehurst, F.W.",
    title = "Bonding in lithium tetrafluoroberyllate(II)",
    journal = "Acta Crystallographica, Section B: Structural Science",
    year = "1983",
    volume = "39",
    pages = "303-306",
    ASTM_id = "ASBSDK"
}

@article{Hartmann1989,
    author = "Hartmann, P.",
    title = "A uniform description of phenakite type structures as superstructures of beta-Si3N4",
    journal = "Zeitschrift fuer Kristallographie (1979-2010)",
    year = "1989",
    volume = "187",
    pages = "139-143",
    ASTM_id = "ZEKRDZ"
}

@article{Seiler1993,
    author = "Seiler, P.",
    title = "Estimation of ionicity coefficients in Li2 Be F4 crystals by X-ray diffraction",
    journal = "Acta Crystallographica, Section B: Structural Science",
    year = "1993",
    volume = "49",
    pages = "223-235",
    ASTM_id = "ASBSDK"
}

@article{Burns1966,
    author = "Burns, J.H. and Gordon, E.K.",
    title = "Refinement of the crystal structure of Li2 Be F4",
    journal = "Acta Crystallographica (1,1948-23,1967)",
    year = "1966",
    volume = "20",
    pages = "135-138",
    ASTM_id = "ACCRA9"
}