@article{Buerger1972,
    author = "Buerger, M.J. and Venkatakrishnan, V.",
    title = "Crystals with the warwickite structure",
    journal = "Materials Research Bulletin",
    year = "1972",
    volume = "7",
    pages = "1201-1208",
    ASTM_id = "MRBUAC"
}

@article{Harris1967,
    author = "Harris, L.A. and Yakel, H.L.jr.",
    title = "The crystal structure of Y2 Be O4",
    journal = "Acta Crystallographica (1,1948-23,1967)",
    year = "1967",
    volume = "22",
    pages = "354-360",
    ASTM_id = "ACCRA9"
}