„Prométium” változatai közötti eltérés

| dhcp<ref name=str>{{cite journal|doi=10.1016/0022-5088(71)90101-9|title=The crystal structure of promethium|year=1971|last1=Pallmer|first1=P.G.|last2=Chikalla|first2=T.D.|journal=Journal of the Less Common Metals|volume=24|issue=3|pages=233}}</ref><ref name=CRCrare>{{cite book | editor = Lide, D. R.|author=Gschneidner, K.A., Jr. |chapter=Physical Properties of the rare earth metals| title = CRC Handbook of Chemistry and Physics | edition = 86th | location = Boca Raton (FL) | publisher = CRC Press | year = 2005 | isbn = 0-8493-0486-5 |url=http://203.158.253.140/media/e-Book/Engineer/Chemistry/Handbook%20of%20Chemistry%20and%20Physics/Section%2004/04_03_86.pdf|archiveurl=http://www.webcitation.org/1347959141178789|archivedate=2012-09-18}}{{halott link}}</ref>