Robert's claim that the 'J' stood "for nothing" is taken from an interview conducted by Thomas S. Kuhn on November 18, 1963, which currently resides in the Archive for the History of Quantum Physics.
Afirmația lui Robert că „J” nu înseamnă „nimic” provine dintr-un interviu efectuat de Thomas S. Kuhn la 18 noiembrie 1963, astăzi aflat la Archive for the History of Quantum Physics.