His Theorie der juristischen ... 1978: t.p. (Robert Alexy)

GFR 78-A (Robert Alexy)

Metatheorie juristischer Argumentation, c1983: t.p. (Robert Alexy) p. 253 (Dr., Juristisches Seminar d. Georg-August-Univ., Göttingen)

His A theory of legal argumentation, 1989: CIP t.p. (Robert Alexy) pub. info. (Robert Werner Alexy; prof. of public law & legal philos., Christian-Albrechts Univ., Kiel, W. Ger.)

His Begriff und Geltung des Rechts, c1992: t.p. (Robert Alexy) p. 2 (b. 1945)