Dirac paper quoted at Wikipedia From Wikipedia's http://en.wikipedia.org/wiki/Uncertainty_principle:

In 1936 Dirac offered a precise definition and derivation of the time-energy uncertainty relation in a relativistic quantum theory of "events".

The citation to the paper is missing. Can anyone provide the title of this paper and where can I find it? Thanks.
 A: It could be this one, although the paragraph author should have provided the reference:

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*P. A. M. Dirac, "Relativistic Wave Equations". In Proc. R. Soc. London, series A. Math. Phys. Sc. 155 (886) 447-459.

This was obtained from the SAO/NASA Astrophysical Data System. Please note that for that year (1936) this "search engine" also provides another paper by Dirac but at a glance it doesn't seem to be the one you're after.
A: The reference is to the "many-time" formalism which was influential for Feynman Schwinger and especially Tomonaga. It gives the evolution in an interaction picture. I never read the reference, I heard Tomonaga mention it. It's from 1932, not 1936, and Tomonaga writes a follow up in 1946. See the first page of this reference: Link.
A: The discussion in Dirac's book only pertains to the position-momentum uncertainty relation; the question is about the time-energy uncertainty relation which is claimed by many (e.g. Bohm & Aharanov http://148.216.10.84/archivoshistoricosMQ/ModernaHist/Aharonov%20a.pdf) to be fundamentally different.
The reference that I have just given is known to the becko because it's from the Wikipedia article that he cites. Others might like to read it (I mean try to read it).
