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WikiPedia: Phân_rã_beta http://adsabs.harvard.edu/abs/1936PhRv...49..368K http://adsabs.harvard.edu/abs/1939PhRv...56.1184F http://adsabs.harvard.edu/abs/1948PhRv...73.1207K http://link.aps.org/doi/10.1103/PhysRev.56.1184 //dx.doi.org/10.1103%2FPhysRev.49.368 //dx.doi.org/10.1103%2FPhysRev.56.1184 //dx.doi.org/10.1103%2FPhysRev.73.1207 http://www-nds.iaea.org/livechart http://www-nds.iaea.org/relnsd/vcharthtml/VChartHT... http://bachkhoatoanthu.vass.gov.vn/noidung/tudien/...