Apel, Karl-Otto (1975). "The problem of philosophical fundamental-grounding in light of a transcendental pragmatic of language". Man and World. 8 (3): 239–275. doi:10.1007/BF01255646. S2CID144951196.
Hintikka, Jaakko (1962). "Cogito, Ergo Sum: Inference or Performance?". The Philosophical Review. 71 (1): 3–32. doi:10.2307/2183678. JSTOR2183678.
Hintikka, Jaakko (1962). "Cogito, Ergo Sum: Inference or Performance?". The Philosophical Review. 71 (1): 3–32. doi:10.2307/2183678. JSTOR2183678.
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Apel, Karl-Otto (1975). "The problem of philosophical fundamental-grounding in light of a transcendental pragmatic of language". Man and World. 8 (3): 239–275. doi:10.1007/BF01255646. S2CID144951196.