Citation Not Unique

This citation is not unique because more than one item appears on the page referenced. At this time, we can only provide some links from which to choose. Please try the links below to find the particular item you are looking for.

Deficiency of the Phenomenological Theory of the Lamb Shift
Frederick J. Belinfante
Phys. Rev. 91, 1285 (1953)

The Construction of Potentials in Quantum Field Theory
Abraham Klein
Phys. Rev. 91, 1285 (1953)