The Characteristic Subgroups of the Baer-Specker Group. Rüdiger Göbel (1974) Mathematische Zeitschrift
The Jacobson radical of edomorphism rings of totally projective groups of finite type. Jutta Hausen (1977) Journal für die reine und angewandte Mathematik
The Lower Central Series of a Join of Subnormal Subgroups. J.C. Lennox, D. Segal, S. Stonehewer (1977) Mathematische Zeitschrift
The semigroup of finite complexes of a group Ann Miller, Franklin D. Pedersen, Walter S. Sizer (1983) Czechoslovak Mathematical Journal
The Structure of Ext (A,..) and V = L. Martin Huber, H.L. Hiller, S. Shelah (1978) Mathematische Zeitschrift