Hempel, Carl G; Oppenheim, Paul (Apr 1948). "Studies in the logic of explanation". Philosophy of Science. 15 (2): 135–175. doi:10.1086/286983. JSTOR185169. S2CID16924146.
Hempel, Carl G. (15 January 1942). "The Function of General Laws in History". The Journal of Philosophy. 39 (2). Philosophy Documentation Center: 35–48. doi:10.2307/2017635. ISSN0022-362X. JSTOR2017635.
Hempel, Carl G. (1945). "Studies in the Logic of Confirmation". Mind. LIV (213). Oxford University Press (OUP): 1–26. doi:10.1093/mind/liv.213.1. ISSN0026-4423.
Hempel, Carl G; Oppenheim, Paul (Apr 1948). "Studies in the logic of explanation". Philosophy of Science. 15 (2): 135–175. doi:10.1086/286983. JSTOR185169. S2CID16924146.
Hempel, Carl G. (15 January 1942). "The Function of General Laws in History". The Journal of Philosophy. 39 (2). Philosophy Documentation Center: 35–48. doi:10.2307/2017635. ISSN0022-362X. JSTOR2017635.
Hempel, Carl G; Oppenheim, Paul (Apr 1948). "Studies in the logic of explanation". Philosophy of Science. 15 (2): 135–175. doi:10.1086/286983. JSTOR185169. S2CID16924146.
Hempel, Carl G. (15 January 1942). "The Function of General Laws in History". The Journal of Philosophy. 39 (2). Philosophy Documentation Center: 35–48. doi:10.2307/2017635. ISSN0022-362X. JSTOR2017635.
Hempel, Carl G. (1945). "Studies in the Logic of Confirmation". Mind. LIV (213). Oxford University Press (OUP): 1–26. doi:10.1093/mind/liv.213.1. ISSN0026-4423.