Samuel J. Barnett
Phys. Rev. (Series I) 6, 257 (1898) - Published 1 May, 1898
C. D. Child
Phys. Rev. (Series I) 6, 285 (1898) - Published 1 May, 1898
Arthur Gordon Webster
Phys. Rev. (Series I) 6, 297 (1898) - Published 1 May, 1898
Phys. Rev. (Series I) 6, 315 (1898) - Published 1 May, 1898
