1. Aarnio, A. (1977). On legal reasoning. Turku: Turun Yliopisto.
2. Aarnio, A. (1978). Legal point of view. Six essays on legal philosophy. Helsinki (translated from the Finnish by Jyrki Uusitalo).
3. Aarnio, A. (1979a). Denkweisen der Rechtswissenschaft. (Ways of thinking in legal science). Wien/New York: Springer.
4. Aarnio, A. (1979b). Linguistic philosophy and legal theory. Some problems of legal argumentation. In: W. Krawietz, K. Opalek, A. Peczenik & A. Schramm (Eds.), Argumentation und Hermeneutik in der Jurisprudenz. (pp. 17-41). Berlin: Duncker & Humblot.
5. Aarnio, A. (1981). On truth and the acceptability of interpretative propositions in legal dogmatics. In: A. Aarnio, I. Niiniluoto, J. Uusitalo (Eds.), Methodologie und Erkenntnistheorie der juristischen Argumentation (pp. 33-52). Berlin: Duncker & Humblot.