Gyanchandani, Jyoti; Sikka, S. K. (10. maj 2011). »Physical properties of the 6 d -series elements from density functional theory: Close similarity to lighter transition metals«. Physical Review B. 83 (17): 172101. doi:10.1103/PhysRevB.83.172101. {{navedi časopis}}: |access-date= potrebuje |url= (pomoč)