Bardeen, John. "Tunneling from a Many-Particle Point of View" in Physical Review Letters.

Bardeen, John. "Tunneling from a Many-Particle Point of View" in Physical Review Letters, volume 6 no. 2, 15 January 1961, American Physical Society. Significant paper (cited 3800+ times) from the double-Nobelist (1956 for the invention of the transistor with Walter Brattain and William Shockley; and 1972 for the development with Leon Cooper and J Robert Schrieffer of the Bardeen Cooper Schrieffer (BCS) theory of superconductivity.) . Original wrappers. Original owner name in pen at top right corner from cover. Fine copy. "Bardeen has very recently pointed out, however, that in the case of a many-electron system, the tunnelling process is very conveniently regarded as in time-dependent perturbation theory. In other words, it is seen as a transition process from one set of nearly Stationary states to another."--Richard Prange, "Tunneling from a Many-Particle Point of View", University of Maryland, 1962.