@article{Widera1980,
    author = "Widera, A. and Schaefer, H.",
    title = "Uebergangsformen zwischen den Zintlphasen und echten Salzen: die Verbindungen A3 B O mit A = Ca, Sr, Ba und B = Sn, Pb",
    journal = "Materials Research Bulletin",
    year = "1980",
    volume = "15",
    pages = "1805-1809",
    ASTM_id = "MRBUAC"
}