D. B. Brace
Phys. Rev. (Series I) 21, 289 (1905) - Published 1 November, 1905
L. L. Hendren
Phys. Rev. (Series I) 21, 314 (1905) - Published 1 November, 1905
Bruce V. Hill
Phys. Rev. (Series I) 21, 335 (1905) - Published 1 November, 1905
Fernando Sanford
Phys. Rev. (Series I) 21, 343 (1905) - Published 1 November, 1905