^
abWerthamer, N. R; Helfand, E; Hohenberg, P. C (1966). "Temperature and Purity Dependence of the Superconducting Critical Field, Hc2. III. Electron Spin and Spin-Orbit Effects". Physical Review. 147 (1): 295–302.
Bibcode:
1966PhRv..147..295W.
doi:
10.1103/PhysRev.147.295.