@article{Lodziana2001,
    author = "Lodziana, Z. and Parlinski, K. and Hafner, J.",
    title = "Ab initio studies of high-pressure transformations in Ge O2",
    journal = "Physical Review, Serie 3. B - Condensed Matter (18,1978-)",
    year = "2001",
    volume = "63",
    pages = "1341061-1341067",
    ASTM_id = "PRBMDO"
}

@article{Shiraki2003,
    author = "Shiraki, K. and Tsuchiya, T. and Ono, S.",
    title = "Structural refinements of high-pressure phases in germanium dioxide",
    journal = "Acta Crystallographica, Section B: Structural Science",
    year = "2003",
    volume = "59",
    pages = "701-708",
    ASTM_id = "ASBSDK"
}