@article{Bruzzone1989,
    author = "Bruzzone, G. and Fornasini, M.L. and Merlo, F.",
    title = "Re-examination of the Ca - Ga system and crystal structure of Ca Ga4, a monoclinic distortion of the Ba Al4 type",
    journal = "Journal of the Less-Common Metals",
    year = "1989",
    volume = "154",
    pages = "67-77",
    ASTM_id = "JCOMAH"
}

@article{HeJunhu1989,
    author = "Junhui, He and Rongguo, Ling",
    title = "Crystal structure determination of Ca Ga4 by x-ray powder diffraction",
    journal = "Hangzhou Daxue Xuebao, Ziran Kexuban (Journal of Hangzhou University (Natural Science)",
    year = "1989",
    volume = "16",
    pages = "179-182",
    ASTM_id = "HHHPD7"
}