1. Bohr, N.: The quantum postulate and the recent development of atomic theory at Atti del Congresso Internazionale dei Fisici, Como, 11–20 September 1927. Zanichelli, Bologna, 1928, vol. 2, pp. 565–588 (1928)
2. Bohr, N.: Substance of the Como lecture is reprinted in Nature, vol. 121, pp. 580–590 (1928)
3. Bohr, N.: Atomic Theory and the Description of Nature. Cambridge University Press, Cambridge (1934). reprinted 1961
4. Bohr, N.: Atomic Physics and Human Knowledge. Science Editions, New York (1961)
5. Bohr, N.: Discussion with Einstein on epistemological problems in quantum mechanics. In: Schilpp, P.A. (ed.) Albert Einstein, Philosopher-Scientist, pp. 201–241. Library of Living Philosophers, Evansten (1949). Reprint: (Open Court, La salle, Illinois, third edition, 1982) pp. 201–241