Quadratic Relations for Generators of Units in the Modular Function Field. Dan Kubert — 1977 Mathematische Annalen
A System of Free Generators for the Universal even Ordinary Z(2) Distribution on Q2k-Z2k . Dan Kubert — 1976 Mathematische Annalen
Units in the Modular Function Field. III. Distribution Relations. Dan Kubert; Serge Lang — 1975 Mathematische Annalen
Units in the Modular Function Field. II. A full Set of Units. Dan Kubert; Serge Lang — 1975 Mathematische Annalen