@article{Huang2014,
    author = "Huang, Hongwei and Tian, Na and Jin, Shifeng and Zhang, Yihe and Wang, Shuobo",
    title = "Syntheses, characterization and nonlinear optical properties of a bismuth subcarbonate Bi2 O2 CO3",
    journal = "Solid State Sciences",
    year = "2014",
    volume = "30",
    pages = "1-5",
    ASTM_id = "SSSCFJ"
}

@article{Grice2002,
    author = "Grice, J.D.",
    title = "A solution to the crystal structures of bismutite and beyerite",
    journal = "Canadian Mineralogist",
    year = "2002",
    volume = "40",
    pages = "693-698",
    ASTM_id = "CAMIA6"
}