Jakob Kunz
Phys. Rev. (Series I) 28, 313 (1909) - Published 1 May, 1909
A. H. Pfund
Phys. Rev. (Series I) 28, 324 (1909) - Published 1 May, 1909
B. J. Spence
Phys. Rev. (Series I) 28, 337 (1909) - Published 1 May, 1909
Phys. Rev. (Series I) 28, 349 (1909) - Published 1 May, 1909
R. C. Gibbs
Phys. Rev. (Series I) 28, 361 (1909) - Published 1 May, 1909
Phys. Rev. (Series I) 28, 377 (1909) - Published 1 May, 1909
