Edmund T. WHITTAKER
Scalar Potential Functions
Mathematische Annalen 57: 333-356 (1903) ~
"On the Partial Differential Equations of Mathematical Physics"
Page: 333 ~ 334 ~ 335 ~ 336 ~ 337 ~ 338 ~ 339 ~ 340 ~ 341 ~ 342 ~ 343 ~ 344 ~ 345 ~ 346 ~ 347 ~ 348 ~ 349 ~ 350 ~ 351 ~ 352 ~ 353 ~ 354 ~ 355 ~ 356
Proceedings of the London Mathematical Society, Series 2, Vol. 1 (No. 843): 367-372 (1904) ~
"On An Expression of the Electromagnetic Field Due to Electrons by Means of Two Scalar Potential Functions"