1. J. Buchmann, On the Computation of Units and Class Numbers by a Generalization of Lagrange's Algorithm, Journal of Number Theory, Vol. 26, No. 1 (1987) 8–30
2. J. Buchmann, On the Period Length of the Generalized Lagrange Algorithm, Journal of Number Theory, Vol. 26, No. 1 (1987) 31–37
3. J. Buchmann, Zur Komplexität der Berechnung von Einheiten und Klassenzahlen algebraischer Zahlkörper, Habiliationsschrift, Düsseldorf (1987)
4. J. Buchmann, A subexponentional algorithm for the determination of class group and regulator of algebraic number fields, Séminaire de Théorie des Nombres, Paris 1988–1989, Birkhäuser Verlag (1990)
5. J. Buchmann, Reducing lattice bases by means of approximations, in preparation.