Review: A page linked to here on Jan. 25—
psychoanalyst Heinz Kohut on the "nuclear self"—

IMAGE- Kohut, 'Restoration of the Self,' p. 182

The Psychoanalytic Electronic Publishing (PEP) website has a 
paper on Kohut's concept— "Nuclear Conflict and the Nuclear Self"—
to which access is restricted:

IMAGE- Psychoanalytic Electronic Publishing (PEP) access statement

Perhaps the late Aaron Swartz (below) now has freer access
to this and other restricted reading.