@article{Asprey1960,
    author = "Asprey, L.B. and Kruse, F.H.",
    title = "Divalent thulium. Thulium-di-iodide",
    journal = "Journal of Inorganic and Nuclear Chemistry",
    year = "1960",
    volume = "13",
    pages = "32-35",
    ASTM_id = "JINCAO"
}