Frank J. Mellencamp
Phys. Rev. (Series I) 29, 329 (1909) - Published 1 October, 1909
C. D. Child
Phys. Rev. (Series I) 29, 351 (1909) - Published 1 October, 1909
S. Leroy Brown
Phys. Rev. (Series I) 29, 369 (1909) - Published 1 October, 1909
L. R. Ingersoll and R. T. Birge
Phys. Rev. (Series I) 29, 392 (1909) - Published 1 October, 1909
F. K. Richtmyer
Phys. Rev. (Series I) 29, 404 (1909) - Published 1 October, 1909