Thoralf Skolem. On the proofs of independence of the axioms of the classical sentential calculus. Det Kongelige Norske Videnskabers Selskab, Forhandlinger, vol. 24 (1951), pp. 20–25.
Alonzo Church, Nicholas Rescher · Journal of Symbolic Logic · 1953
Thoralf Skolem. On the proofs of independence of the axioms of the classical sentential calculus. Det Kongelige Norske Videnskabers Selskab, Forhandlinger, vol. 24 (1951), pp. 20–25. - Volume 18 Issue 1