Although his calculation was a non-relativistic one, it provided the impetus for later work done by Richard Feynman, Julian Schwinger and others which marked the beginning of modern quantum electrodynamics.
His calculation was a non-relativistic one. It provided the impetus for later work. This later work was done by Richard Feynman. This later work was done by Julian Schwinger. This later work was done by others. These others marked the beginning of modern quantum electrodynamics.