Superconductivity of Protactinium Fowler, R. D. ; Matthias, B. T. ; Asprey, L. B. ; Hill, H. H. ; Lindsay, J. D. ; Olsen, C. E. ; White, R. W. Abstract Publication: Physical Review Letters Pub Date: November 1965 DOI: 10.1103/PhysRevLett.15.860 Bibcode: 1965PhRvL..15..860F