"lˈɛvəlz ʌv kəmplˈɛksᵻɾi ænd lˈɛvəlz ʌv ɹɪˈælᵻɾi", ɪnðɪ ɪmˈɜːdʒəns ʌv kəmplˈɛksᵻɾi ɪn mˌæθɪmˈæɾɪks, fˈɪzɪks, kˈɛmɪstɹi, ænd baɪˈɑːlədʒi, pɹəsˈiːdɪŋz ʌvðə plˈiːnɚɹi sˈɛʃən ʌvðə pɔntˈɪfɪkəl ɐkˈædəmi ʌv sˈaɪənsᵻz, twˈɛnti sˈɛvən θˈɜːɾi wˈʌn ɑːktˈoʊbɚ nˈaɪntiːnhˈʌndɹɪd nˈaɪnti tˈuː, kˈæsɪnə pˈiːoʊ ɹˌoʊmən fˈoːɹ, vˈæɾɪkən, pˌɔntɪfˈɪʃə ˌækədˈiːmiə sˈaɪənʃaɪɚɹəm ᵻdˈɪʃənz, vˈæɾɪkən sˈɪɾi, nˈaɪntiːnhˈʌndɹɪd nˈaɪnti sˈɪks dˈɪstɹɪbjˌuːɾᵻd baɪ pɹˈɪnstən jˌuːnɪvˈɜːsᵻɾi pɹˈɛs.
"Levels of Complexity and Levels of Reality", in The Emergence of Complexity in Mathematics, Physics, Chemistry, and Biology, Proceedings of the Plenary Session of the Pontifical Academy of Sciences, 27–31 October 1992, Casina Pio IV, Vatican, Pontificia Academia Scientiarum Editions, Vatican City, 1996 (distributed by Princeton University Press).