Cessna, J T Standardization of radium-223 by liquid scintillation counting. [electronic resource] - Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine - 1523-8 p. digital Publication Type: Journal Article ISSN: 1872-9800 Standard No.: 10.1016/j.apradiso.2009.11.068 doi Subjects--Topical Terms: Half-LifeRadium--standardsScintillation Counting--methodsTritium