Ignjatović, Aleksandar Hilbert's Program and The Omega-Rule Aleksandar Ignjatović. Hilbert's Program and The Omega-Rule. Philosophy 1992-10-01
    https://kilthub.cmu.edu/articles/journal_contribution/Hilbert_s_Program_and_The_Omega-Rule/6491936
10.1184/R1/6491936.v1