Richard Threlfall
Phys. Rev. (Series I) 5, 65 (1897) - Published 1 August, 1897
F. L. O. Wadsworth
Phys. Rev. (Series I) 5, 75 (1897) - Published 1 August, 1897
H. Rubens and E. F. Nichols
Phys. Rev. (Series I) 5, 98 (1897) - Published 1 August, 1897
A. A. Noyes and C. G. Abbot
Phys. Rev. (Series I) 5, 113 (1897) - Published 1 August, 1897